There has been tension between McMahon and Shari Redstone in recent months, including over a potential "60 Minutes" settlement with the Trump administration.
A new report finds a direct link to foreclosures from climate change and suggests as lenders factor that risk into underwriting, it could alter credit scores.
The publisher of the Daily Mail has held talks in recent days about taking a minority stake in the Telegraph newspapers as part of a deal to end the two-year impasse over their ownership.