Top Prez aide is on way out

White House counsel Don McGahn will be leaving his post this fall, President Trump confirmed Wednesday.

Word of McGahn's impending departure comes weeks after it was revealed he has cooperated extensively with the special counsel's investigation into Russian election interference and possible criminal wrongdoing on Trump's part.

McGahn plans to leave the White House either after Brett Kavanaugh is confirmed to the Supreme Court or after the November midterms, according to Axios, which reported his exit hours before Trump tweeted about the shakeup.

“White House Counsel Don McGahn will be leaving his position in the fall, shortly after the confirmation (hopefully) of Judge Brett Kavanaugh to the United States Supreme Court,” Trump wrote. “I have worked with Don for a long time and truly appreciate his service!”

The social media announcement surprised many in Washington, including McGahn.

He was not aware that Trump planned to send the tweet before it posted, according to The Washington Post.

Sen. Charles Grassley, Senate Judiciary Committee chairman, implored Trump to entice McGahn to stay. “I hope it's not true McGahn is leaving White House Counsel. U can't let that happen,” he tweeted.

The 50-year-old attorney has been instrumental in aiding Republican efforts to stock the federal judiciary with young, conservative judges.

Despite reports of McGahn's role as peacemaker and liaison between Trump and Congress, their relationship has been strained amid the Russia probe. McGahn reportedly threatened to quit last year when Trump became fixated on firing special counsel Robert Mueller. He was also among the officials who fought back when Jeff Sessions contemplated resigning as attorney general.

Since then, he has cooperated with Mueller's inquiries.

Trump insisted he isn't worried about what McGahn told investigators because he signed off on the interviews.