Global leaders, current and former U.S. lawmakers, and heads of major U.S. companies descended on Washington, DC, for President Trump's inaugural events over the long weekend.

Why it matters: Trump takes office with Republican control of Congress, support from business and foreign leaders and what's seen as more cultural acceptance of the MAGA movement.

• Follow Axios' live coverage of Inauguration Day.
• Trump's inauguration is taking place inside the Capitol rotunda due to weather.
• Former Vice President Mike Pence, who served with Trump during his first term, was also in attendance.

We'll be tracking some of the notable attendees. Among them:

Current and former members of Congress

Former Republican House Speakers Kevin McCarthy (Calif.), Newt Gingrich (Ga.), and John Boehner (Ohio) trickled into the Capitol on Monday.

• Notably absent was former House Speaker Nancy Pelosi (D-Calif.) who said she wouldn't attend the inauguration, multiple outlets reported.
• Former Senate Minority Leader Mitch McConnell (R-Ky.) was in attendance with his wife, former U.S. Secretary of Transportation Elaine Chao, who served during Trump's first term and quit her role after the Jan. 6 insurrection.

Tech and business leaders

• Elon Musk, CEO of Tesla, owner of X
• Sam Altman, CEO of OpenAI
• Mark Zuckerberg, CEO of Meta
• Jeff Bezos, CEO of Amazon, owner of the Washington Post
• Sundar Pichai, CEO of Google
• Rupert Murdoch, former executive chairman of Fox Corp., joined inauguration church services
• Dana White, CEO of the Ultimate Fighting Championship
• Shou Zi Chew, CEO of TikTok
• Joe Rogan, host of "The Joe Rogan Experience" podcast
• Tim Cook, CEO of Apple

Foreign leaders

• Right-wing leaders, including Argentine President Javier Milei and Italian Prime Minister Giorgia Meloni, were in attendance.
• Also at the inauguration was Chinese Vice President Han Zheng, who held meetings with Vice President Vance and Musk ahead of the event, the AP reported.

Former U.S. presidents

Former Presidents Bill Clinton, George W. Bush and Barack Obama attended the inauguration.

• Former Secretary of State Hillary Clinton and former first lady Laura Bush joined, but former first lady Michelle Obama did not.

Go deeper: Trump readies executive blitz in White House return

Editor's note: This story has been corrected. Dana White was misidentified as Joe Rogan in a photo.

Global leaders, current and former U.S. lawmakers, and heads of major U.S. companies descended on Washington, DC, for President-elect Trump's inaugural events over the long weekend.

Why it matters: Trump takes office with Republican control of Congress, support from business and foreign leaders and what's seen as more cultural acceptance of the MAGA movement.

• Follow Axios' live coverage of Inauguration Day.
• Trump's inauguration is taking place inside the Capitol Rotunda due to weather.
• Former Vice President Mike Pence, who served with Trump during his first term, was also in attendance.

We'll be tracking some of the notable attendees. Among them:

Current and former members of Congress

Former Republican House Speakers Kevin McCarthy (Calif.), Newt Gingrich (Ga.), John Boehner (Ohio) trickled into the Capitol Monday.

• Notably absent was former House Speaker Nancy Pelosi (D-Calif.) who said she wouldn't attend the inauguration, multiple outlets reported.
• Former Senate Minority Leader Mitch McConnell (R-Ky.) was in attendance with his wife, former U.S. Secretary of Transportation Elaine Chao, who served during Trump's first term and quit her role after the Jan. 6 insurrection.

Tech CEOs

• Elon Musk, CEO of Tesla and owner of X
• Sam Altman, CEO of OpenAI
• Mark Zuckerberg, CEO of Meta

Foreign leaders

Right-wing leaders including Argentinian President Javier Milei and Italian Prime Minister Giorgia Meloni were in attendance.

Go deeper: Trump readies executive blitz in White House return

U.S. voters between the ages of 18 and 29 were more likely than their elders to accept the recent killing of United Healthcare CEO Brian Thompson in New York City, new polling found.

The big picture: The reaction to Thompson's death and suspected shooter Luigi Mangione have captivated America. The event has laid bare public outrage towards the insurance industry, curiosity about Mangione's digital footprint and a blatant lack of empathy from people online.

• Most voters (68%) think the actions of the killer against Thompson were unacceptable, while 17% found them acceptable, an Emerson College poll out this week found.
• Young voters were far more split: 41% found the killer's actions acceptable, while 40% found them unacceptable, per the poll. About 24% found them "somewhat acceptable" and 17% "completely acceptable."
• Mangione, 26, was arrested in Pennsylvania last week after a days-long search for a suspect. He faces a murder charge and others in New York and other forgery, gun-related and misdemeanor charges in Pennsylvania.

State of play: After Thompson's shocking death in Manhattan on Dec. 4, social media users raged against health insurers, with posters lashing out over coverage denials and other business practices, Axios' Maya Goldman reported.

• Even before Mangione was arrested, posters hailed him as a folk hero and posted jokes and memes celebrating the suspect and his purported cause, Axios' Ivana Saric reported.
• TikTok, a top social media app for young people, was awash with comedy over the killing.
• Online storefronts also began selling merchandise, including sweatshirts, wine tumblers and hats emblazoned with words "deny," "defend" and "depose" — industry parlance found on shell casings at the crime scene.

Zoom in: The Emerson poll also found a partisan split and small gender gap among respondents.

• 22% of Democrats found the killer's actions acceptable, while 59% found them unacceptable. Among Republicans, 12% found the actions acceptable while 16% of independents said the same.
• Men (19%) found the killer's actions slightly more acceptable than women (14%).

Between the lines: Thompson's killing has unleashed a debate over the insurance industry's frequency of denying claims and how unaffordable health care has become for many Americans.

• "It's really important that we take a step back, this is not to comment and this is not to say that an act of violence is justified, but I think for anyone who is confused or shocked or appalled, they need to understand that people interpret and feel and experience denied claims as an act of violence against them," Rep. Alexandria Ocasio-Cortez (D-N.Y.) said in a recent appearance on CBS.

The bottom line: Other recent data has revealed Americans are now more likely to accept violence.

• Last year, a Public Religion Research Institute (PRRI) survey found a quarter of Americans agreed that "patriots may have to resort to violence in order to save our country" — the most in the nearly three years the question was asked since Donald Trump's first White House term.

Go deeper: Health care uproar sparks new legislation in Congress

Methodology: The poll of 1,000 adults was conducted between Dec. 11-13 with a margin of error of +/- 3 percentage points.

President-elect Trump could resurrect his first-term goal to overhaul the U.S. Postal Service, which would influence how e-commerce giants operate, impact hundreds of thousands of government jobs and potentially undercut reliable delivery to more remote areas.

Why it matters: America's mail carrier is the second most-beloved federal agency behind the National Park Service, polling shows. Like many industries, the rise of the internet has hurt its bottom line — and its leadership has failed to reverse that financial trend in recent years.

• The Washington Post reported Saturday, citing three unnamed sources, that Trump talked with his commerce secretary pick Howard Lutnick at Mar-a-Lago about his interest in overhauling the agency. He reportedly said the government shouldn't subsidize the mail agency given its recurring losses.
• The president-elect also "convened a group of transition officials to ask for their views on privatizing the agency" earlier this month, The Post reported.
• Axios reached out to the Trump transition team for confirmation and comment. His specific plans are not immediately clear.

State of play: Republicans have signaled displeasure with USPS in a few other recent incidents.

• Rep. Marjorie Taylor Greene (R-Ga.) posted on X earlier this week alongside a Fox Business chyron about the Postal Service's fiscal-year losses: "This is what happens when government-run entities are bloated, mismanaged, and unaccountable."
• Greene, who's incoming chair of the House's "DOGE" Oversight committee, added: "It's time to demand real reform and stop wasting taxpayer dollars!"
• Postmaster General Louis DeJoy, who was appointed to his role in 2020 and has introduced a 10-year plan to rescue the agency, faced a GOP-led grilling during a House Oversight hearing this week.
• Republicans criticized the carrier for financial losses and claimed it was providing subpar service, at one point leading to a viral moment where DeJoy covered his ears during criticism.

Democrats have been more sympathetic to the agency and against privatization.

• Privatization is "our big fear," Rep. Gerry Connolly (D-Va.) told The Post. "That could have disastrous consequences, because when you go private, the profit motive is everything."

By the numbers: The Postal Service lost $9.5 billion in the fiscal year ending Sept. 30. It comparatively lost $6.5 billion during the same period the previous year. It has not been profitable since 2006.

• In 2022, Congress passed a $107 billion bipartisan package to provide financial relief and help modernize its operations.

What they're saying: The Postal Service "is already engaged in an initiative to ensure that we can provide our customers with a high level of service to every delivery address in the nation at least 6-days-a-week in an efficient and financially sustainable fashion as required by law," a USPS spokesperson told Axios.

• The spokesperson said USPS is seeking "an advisory opinion from our regulator concerning our plan to modernize and optimize our processing and transportation networks." It's also looking at adding automation equipment.

The big picture: USPS helps guarantee Americans in all parts of the country receive mail service under its "universal service obligation." Enshrined in the U.S. Constitution, the postal service pre-dates the country's founding.

• During the COVID pandemic, its universal service was especially important as people stayed home and could still receive medication, stimulus checks and census forms by mail.
• The Postal Service also provides last-mile delivery to logistics companies like Amazon, FedEx and UPS to harder-to-reach areas.

Flashback: Some of Trump's criticism toward USPS during the final year of his first term was related to mail-in voting. The Postal Service ultimately pulled off the mass delivery of ballots with limited issues.

What to watch: In 2020, DeJoy, a longtime business executive who was a GOP megadonor, was seen as a villain on the left during the throes of the election.

• Since President Biden has been in office, DeJoy's relationship with Democrats became less icy — in part thanks to his support for millions of at-home COVID-19 test deliveries; transitioning the USPS fleet toward electric vehicles; and the sweeping bipartisan reform act in 2022.
• Many expected Biden would have fired him, though the process is more complicated. How long he fares under Trump 2.0 is unclear.

Editor's note: This story has been updated with additional context.

South Korea's parliament on Saturday voted to impeach embattled President Yoon Suk Yeol after his surprise martial law declaration earlier this month stunned global allies and set off constitutional concerns.

Why it matters: Yoon's impeachment marks the second time in less than a decade that a South Korean leader in office has faced such proceedings. The upheaval comes as America's closest allies abroad including Germany and France face political and economic chaos.

• The National Assembly passed the motion 204-85.
• Yoon is suspended from carrying out presidential powers and duties, and Prime Minister Han Duck-soo will take over as acting president.

State of play: Yoon has remained defiant, pledging to "not give up" and do "my best until the last moment for the nation."

• His brief declaration of martial law on Dec. 3 ignited immediate turmoil. He ultimately revoked it under pressure from his own party and a vote from the opposition-led legislature.
• Yoon survived an attempt to impeach last week after members of his party boycotted the vote.
• He is also under an insurrection investigation led by law enforcement.

What's next: The country's Constitutional Court has up to 180 days to officially adjudicate parliament's decision — dismissing Yoon or restoring him to office.

• If the court rules to throw him out, South Korea must hold an election within 60 days to select a successor.

Go deeper: America's allies are in trouble

Raw milk has become a common rallying point for right-wing media and wellness influencers — and a cause that Robert F. Kennedy Jr. could supercharge as President-elect Trump's Health and Human Services secretary nominee.

Why it matters: The dairy product has had a niche following that transcends partisanship for decades. But federal health officials say the lack of heating and pasteurization poses risks like exposure to harmful bacteria like E. coli and listeria — a concern that's been amplified by bird flu spreading among dairy cattle.

• The Food and Drug Administration and Centers for Disease Control and Prevention back pasteurization for milk safety. They say raw milk has caused serious illness and a handful of deaths. It's riskiest for pregnant people, seniors, kids and those who are immunocompromised.
• Experts worry RFK Jr.'s advocacy could undermine science. "What I'm more worried about is that the influence of statements from a position of authority might be misinterpreted as scientific fact, when in reality there's very, very strong evidence to the contrary," Meghan Davis, an associate professor at Johns Hopkins University who studies environmental health and infectious disease, told Axios.
• Davis has said the threat of H5N1 avian flu virus spreading via raw milk consumption has "pandemic potential." At least 40 bird flu infections have been reported in humans in the U.S., mostly associated with exposure to sick or infected cows or poultry.

Zoom in: Raw milk doesn't undergo pasteurization, a process that applies heat to kill pathogens. Since 1987, the FDA has barred interstate shipments of the product and mandated milk be pasteurized, but states control raw milk sales within their borders.

• Pasteurization, named after French chemist and microbiologist Louis Pasteur, was invented in the 19th century. The same process is used for wine and beer.

State of play: State laws easing the sale and purchase of raw milk have contributed to its rising popularity. So, too, has increasing distrust of public health authorities among libertarians and conservatives, some of whom also frame raw milk as a way to support local producers.

• Weekly raw milk sales were up in May by as much as 65% compared with the same period last year, the AP reported.
• States including Louisiana and Colorado passed or introduced raw milk legislation that make it easier to buy and sell.
• TikTok influencers tout unverified health benefits like extra nutrients or gut-friendly probiotics. Commentators on sites like Gab, Rumble and Infowars decry restrictions on raw milk availability as government overreach.

Longtime raw milk proponents rave about its purported benefits.

• Sally Fallon Morell, president of the pro-raw milk Weston A. Price Foundation, has been organizing on the issue of increasing availability for years. For her, it was personal: A self-described "breastfeeding Nazi," she struggled to provide enough milk for multiple children in the 1970s and 1980s.
• She then discovered raw milk through a book and gave it to her children.

"It was life-changing. It saved [my son's] life. If you've never been in a situation where you see your child starving, you don't understand the relief that this gives," she told Axios.

• Morell set up "A Campaign for Real Milk" in 1999 to provide information on and sources for raw milk, which she's seen explode. She blamed the dairy lobby in part for raw milk's less savory reputation.
• "They don't want farmers to have the right to sell directly to the public and to set their price."

Between the lines: What was once measured or curious coverage of raw milk in left-leaning outlets and liberal foodie hubs like Whole Foods is now full-blown advocacy in more conservative spaces, Politico reported.

Case in point: The Free Press published a story in early 2023 linking one Maryland-based raw milk consumer's affinity for the product to his preference for the blockchain over big banks. (He'd converted from Oatly and Beyond Meat patties.)

What to watch: There's no denying public health agencies have had difficulty reaching audiences with scientific evidence, especially since the COVID-19 pandemic.

• "We're at a new precipice where, if the FDA says something, there's a fairly large amount of people that are going to do the opposite just because they said that," Katelyn Jetelina, a San Diego-based epidemiologist and author of the Your Local Epidemiologist newsletter, told Axios.
• The question is how much Kennedy could harness the public health agencies under HHS to message the benefits of raw milk.
• The best bet is to "equip trusted messengers" within a community to "help answer questions from a place of empathy," Jetelina said.