The 50-year-old McGahn would become the latest in a long line of officials who have left Trump's 19-month presidency, either officials who have been fired, pushed out or voluntarily departed.
Mr. Trump tweeted on Wednesday news of McGahn's departure, which is set to take place sometime this fall.
He is also tasked with advising the president and other White House staff on legal issues that pertain to the government.
McGahn had openly expressed his frustrations regarding his frayed relationship with the president and had signaled his desire to leave the White House months ago.
Donald McGahn left listens as President Donald Trump speaks during a cabinet meeting
McGahn put off making the call because he disagreed with the strategy, said the person, who spoke on condition of anonymity to describe internal deliberations. The New York Times first reported Trump's move to fire Mueller and McGahn's refusal to carry out the order. He provided the investigators examining whether Mr. Trump obstructed justice a clear view of the president's most intimate moments with his lawyer.
Emmet Flood, who now directs the Russian Federation legal strategy from inside the White House, is a potential replacement, CNN reported last week.
These discussions reportedly touched on Trump's firing of FBI Director James Comey and his focus on putting loyal officials in charge of the investigation, such as Attorney General Jeff Sessions. "His departure from the White House, whenever that may be, would be a big loss for the Trump Administration and the country".
Because he's a witness in the Russian Federation investigation, McGahn has had little involvement in the White House's response to the probe since at least August 2017, when lawyer Ty Cobb was brought into the West Wing to work directly with investigators. Then in March, Politico ran an article that said he was still eager to exit the White House.
Before joining the Trump campaign and the White House, McGahn worked at the powerful DC law firm Jones Day and previously served as a commissioner on the Federal Election Commission.
Hacen piñata de Thalía y ella la desea en su cumpleaños
Ahora la cantante se ha convertido en el centro de atención, luego que en México se creara una piñata en su honor. Un atuendo con flecos de color rosado que, también provocó una lluvia memes, según La República .