Atlas, who spoke with the president on Monday, joined the administration in August, and was considered a Special Government Employee (SGE), serving a 130-day detail. Atlas’ role is set to expire this week.

Fox News exclusively obtained Atlas’s resignation letter Monday, which was dated Dec. 1. In it, Atlas touted the Trump administration’s work on the coronavirus pandemic, while wishing “all the best” to the incoming Biden administration…

“I sincerely wish the new team all the best as they guide the nation through these trying, polarized times,” Atlas wrote. “With the emerging treatments and vaccines, I remain highly optimistic that America will thrive once again and overcome the adversity of the pandemic and all that it has entailed.”