• Elon Musk and Donald Trump have had a tumultuous relationship over the years.
• While the two traded barbs during Trump's first presidency, they're now political allies.

• Trump officially added Musk to join his administration to help lead his DOGE effort, and Musk calls himself "first buddy."

Elon Musk and Donald Trump are now spending lots of time together, marking a new era of their working relationship.

The world's richest person and president-elect have become close political allies, with Musk calling himself "first buddy" following Trump's most recent victory and donating more than $200 million toward pro-Trump super PACs.

Trump tasked Elon Musk with recommending cost cuts in the federal government, appointing the Tesla CEO to the new Department of Government Efficiency council.

It wasn't always this cozy between the two billionaires, however.

Here's how they reached this point.

November 2016: Musk says Trump is 'not the right guy' for the job

Just before the 2016 presidential election, Musk told CNBC he didn't think Trump should be president. 

"I feel a bit stronger that he is not the right guy. He doesn't seem to have the sort of character that reflects well on the United States," Musk said. 

The billionaire added that Hillary Clinton's economic and environmental policies were the "right ones."

December 2016: Musk appointed to Trump's advisory councils

After he won the presidency, Trump appointed Musk to two economic advisory councils, along with other business leaders like Uber CEO Travis Kalanick. 

Musk got flack for working with the controversial president, but defended his choice by saying he was using the position to lobby for better environmental and immigration policies. 

June 2017: Musk cut ties with the White House in protest of Trump's environmental policies

On June 1, 2017, after Trump announced the US would pull out of the Paris Agreement on climate change, Musk resigned from his roles on presidential advisory boards. 

"Climate change is real. Leaving Paris is not good for America or the world," Musk said in a tweet announcing his departure.

Musk's goal for Tesla is to curb dependence on fossil fuels through electric vehicles, solar power, and stationary energy storage. 

January 2020: 'One of our great geniuses'

During a January 2020 interview with CNBC, Trump praised Musk's accomplishments and intelligence. 

"You have to give him credit," the former president said, referring to Tesla becoming more valuable than Ford and General Motors. "He's also doing the rockets. He likes rockets. And he's doing good at rockets too, by the way." 

Trump went on to call Musk "one of our great geniuses" and likened him to Thomas Edison. 

May 2020: Trump backs up Musk in feud with California covid rules

As the pandemic gripped the US in early 2020, Musk clashed with California public-health officials who forced Tesla to temporarily shut down its factory there. Trump voiced his support for Musk. 

"California should let Tesla & @elonmusk open the plant, NOW," Trump tweeted in May 2020. "It can be done Fast & Safely!"

"Thank you!," Musk replied. 

May 2022: Musk said he would reinstate Trump's Twitter account

In May, Musk said he would unban Trump as the Twitter's new owner. 

Musk called the ban a "morally bad decision" and "foolish to the extreme" in an interview with the Financial Times. Twitter kicked Trump off of its platform following the January 6, 2021 attack on the US Capitol. 

The Tesla billionaire has called himself a "free speech absolutist," and one of his key goals for taking Twitter private was to loosen content moderation. 

July 2022: Trump calls Musk a 'bullshit artist'

In July, Trump took aim at Musk, claiming the businessman voted for him but later denied it. 

"You know [Musk] said the other day 'Oh, I've never voted for a Republican,'" Trump said during a Saturday rally in Anchorage, Alaska. "I said 'I didn't know that.' He told me he voted for me. So he's another bullshit artist."

On Monday, Musk tweeted that Trump's claim was "not true."

July 2022: Musk says Trump shouldn't run again

Musk stopped short of attacking Trump personally, but said he shouldn't run for president again. 

"I don't hate the man, but it's time for Trump to hang up his hat & sail into the sunset. Dems should also call off the attack – don't make it so that Trump's only way to survive is to regain the Presidency," he tweeted. 

He continued: "Do we really want a bull in a china shop situation every single day!? Also, I think the legal maximum age for start of Presidential term should be 69." Trump is 76 years old. 

July 2022: Trump lashes out

Trump then went on the offensive, posting a lengthy attack on Musk on Truth Social, the social media company he founded. 

"When Elon Musk came to the White House asking me for help on all of his many subsidized projects, whether it's electric cars that don't drive long enough, driverless cars that crash, or rocketships to nowhere, without which subsidies he'd be worthless, and telling me how he was a big Trump fan and Republican, I could have said, 'drop to your knees and beg,' and he would have done it," Trump said in a post that criticized two of Musk's ventures, Tesla and the rocket company SpaceX. 

"Lmaooo," Musk responded on Twitter.

October 2022: Trump cheers Musk's Twitter deal, but says he won't return

Following Musk's official buyout of Twitter on Thursday, Trump posted to Truth Social cheering the deal. 

"I am very happy that Twitter is now in sane hands, and will no longer be run by Radical Left Lunatics and Maniacs that truly hate our country," he said. He added that he likes Truth Social better than other platforms, echoing comments from earlier this year in which he ruled out a return to Twitter. 

On Monday, Musk joked about the potential of welcoming the former president back to his newly acquired platform.

"If I had a dollar for every time someone asked me if Trump is coming back on this platform, Twitter would be minting money!," the Tesla CEO tweeted. 

May 2023: Musks hosts Florida Gov. Ron DeSantis' glitchy debut

Musk and other right-leaning voices in Silicon Valley initially supported Florida Gov. Ron DeSantis. DeSantis ended 2022 as Trump's best-positioned primary challenger. In November 2022, as DeSantis was skyrocketing to acclaim, Musk said he would endorse him. In March 2023, after enduring Trump's attacks for months, DeSantis prepared to make history by formally announcing his campaign in an interview on Twitter.

The initial few minutes were a glitchy disaster. Trump and his allies ruthlessly mocked DeSantis' "Space" with Musk and venture capitalist David Sachs. DeSantis' interview later proceeded, but his campaign was dogged for days with negative headlines.

September 2023: A Trump-style border wall is needed, Musk says

Musk live-streamed a visit to the US-Mexico border on Twitter, which he had rebranded as "X." Musk said that one of Trump's signature policies was necessary during his visit to Eagle Pass, Texas, to get a first-person look at what local officials called a crisis at the border.

"We actually do need a wall and we need to require people to have some shred of evidence to claim asylum to enter, as everyone is doing that," Musk wrote on X. "It's a hack that you can literally Google to know exactly what to say! Will find out more when I visit Eagle Pass maybe as soon as tomorrow."

Like Trump and others on the right, Musk had criticized the broader consensus in Washington for focusing too much on Russia's unprovoked war against Ukraine in comparison to domestic issues like migration. 

March 2024: Trump tries to woo Musk, but the billionaire says he won't give him money.

Trump tried to woo Musk during a meeting at the former president's Mar-a-Lago resort. According to The New York Times, Trump met with Musk and a few other GOP megadonors when the former president's campaign was particularly cash-strapped. After The Times published its report, Musk said he would not be "donating money to either candidate for US President." 

It wasn't clear who Musk meant in terms of the second candidate. He had repeatedly criticized President Joe Biden, who looked poised to be headed toward a rematch with Trump.

July 2024: Musk endorses Trump after the former president is shot

Musk said he "fully endorsed" Trump after the former president was shot during a political rally ahead of the Republican National Convention. The billionaire's endorsement marked a major turning point in his yearslong political evolution from an Obama voter. Days later, it would come to light that Musk pressed Trump to select Ohio Sen. JD Vance as his running mate.

Trump announced Vance as his vice presidential pick at the Republican National Convention.

The ticket, Musk wrote on X, "resounds with victory."

It wasn't just his public support that Musk was offering. In July, the Wall Street Journal reported Musk had pledged roughly $45 million to support a pro-Trump super PAC. Musk later said he would donate far less, but his rebranding into a loyal member of the MAGA right was complete.

August 2024: Trump joins Musk for a highly anticipated interview

Trump, who ended the Republican National Convention primed for victory, stumbled after Biden abruptly dropped out of the 2024 race. The former president and his allies have struggled to attack Vice President Kamala Harris, now the Democratic presidential nominee.

Amid Harris' early media blitz, Trump joined Musk on a two-hour livestream on X that garnered an audience of over 1 million listeners. The conversation covered topics ranging from a retelling of Trump's assassination attempt to illegal immigration to Musk's potential role with a government efficiency commission.

In August, Trump began floating the idea that he "certainly would" consider adding Musk to his Cabinet or an advisory role. The Tesla CEO responded by tweeting an AI-generated photo of himself on a podium emblazoned with the acronym "D.O.G.E"—Department of Government Efficiency.

"I am willing to serve," he wrote above the image.

September 2024: Musk says he's ready to serve if Trump gives him an advisory role

In September, Trump softened the suggestion of Musk joining his Cabinet due to his time constraints with running his various business ventures, the Washington Post reported. However, he also said that Musk could "consult with the country" and help give "some very good ideas."

Musk then replied to a tweet about the Washington Post article expressing his enthusiasm.

"I can't wait. There is a lot of waste and needless regulation in government that needs to go," he wrote.

He later tweeted again to show his interest in being appointed by Trump, writing that he "looked forward to serving" the country and would be willing to do with without any pay, title, or recognition.

Trump is reportedly soon to announce that he has taken Musk's advice and is forming a government efficiency commission.

October 2024: Musk speaks at Trump rally in Butler, Pennsylvania

Musk joined Trump onstage during the former president's rally, hosted on October 5 in the same location where Trump survived an assassination attempt in July. Musk sported an all-black "Make America Great Again" cap and briefly addressed the crowd, saying that voter turnout for Trump this year was essential or "this will be the last election." 

"President Trump must win to preserve the Constitution," Musk said. "He must win to preserve democracy in America."

The next day, Musk's America PAC announced that it would be offering $47 to each person who refers registered voters residing in swing states to sign a petition "in support for the First and Second Amendments."

By October, the PAC had reportedly already spent over $80 million on the election, with over $8.2 million spread across 18 competitive House races for the GOP. 

The Tesla CEO later told former Fox News host Tucker Carlson that he might face "vengeance" if Trump loses the election.

November 2024: Trump wins the presidency and names Musk his administration

Musk was by Trump's side on election night at Mar-a-Lago, helping celebrate his victory.

Nearly a week after his 2024 presidential election win, Trump announced that Musk and businessman Vivek Ramaswamy were chosen to lead a newly minted Department of Government Efficiency (or DOGE, as Musk likes to call it, in reference to the meme-inspired cryptocurrency Dogecoin).

"Together, these two wonderful Americans will pay the way for my Administration to dismantle the Government Bureaucracy, slash excess regulations, cut wasteful expenditures, and restructure Federal Agencies," Trump said in a statement. 

It's unclear whether the department will formally exist within the government, though Trump said the office would "provide advice and guidance from outside of Government" and work directly with the White House and Office of Management & Budget.

Musk responded in a post on X that the Department of Government Efficiency will be post all their actions online "for maximum transparency." 

"Anytime the public thinks we are cutting something important or not cutting something wasteful, just let us know!" Musk wrote. "We will also have a leaderboard for most insanely dumb spending of your dollars. This will be both extremely tragic and extremely entertaining."

Outside of administrative duties, Musk has also joined "almost every meeting and many meals that Mr. Trump has had," The New York Times reported, acting as a partial advisor and confidant. The Tesla CEO also reportedly joined Trump's calls with both Ukrainian President Volodymyr Zelenskyy and Turkish President Recep Tayyip Erdogan while both men were at the president-elect's Mar-a-Lago club, where Musk seems to have settled in.

"Elon won't go home," Trump told NBC News jokingly. "I can't get rid of him." 

The two's close relationship has extended to a more personal friendship. Musk was seen attending Trump's Thanksgiving dinner and on the golf course with Trump and his grandchildren, where Kai Trump said he achieved "uncle status."