‘Stop the Insanity,’ said the Post headline. It had been among the president’s most supportive media outlets.

The New York Post, which has long been one of President Donald Trump’s biggest supporters, is urging the president to accept his election loss and focus on helping Republicans maintain control of the Senate. 
In an editorial published Sunday night, the editorial board wrote that Trump’s continued focus on overturning the election results amounts to an “undemocratic coup,” and it was “time to end this dark charade.” 
While the editorial board said Trump “had every right” to challenge the election results, since no widespread fraud was uncovered, it’s time to move on.
—NY Post Opinion (@NYPostOpinion) December 28, 2020
“We understand, Mr. President, that you’re angry that you lost. But to continue down this road is ruinous,” the editorial board wrote. “We offer this as a newspaper that endorsed you, that supported you: If you want to cement your influence, even set the stage for a future return, you must channel your fury into something more productive.”
The editorial board said the president should use his “considerable charm and influence” to help Republicans win the two runoff races in Georgia, which will decide which party controls the US Senate. 
“If Republicans David Perdue and Kelly Loeffler win, they will prevent Biden from rolling back what you have accomplished. A Republican Senate can pressure Biden against returning to the old, failed Iran deal, can stop him from throwing open our southern border, will prevent him from packing the court,” the editorial board wrote. 
“Securing the Senate means securing your legacy,” the board added. 
The editorial board finished their letter to Trump with a warning: “If you insist on spending your final days in office threatening to burn it all down, that will be how you are remembered. Not as a revolutionary, but as the anarchist holding the match.”