Trump informed the Senate Intelligence Committee on Friday of his decision to fire Atkinson, according to a letter obtained by the Associated Press.
Trump said in the letter that it was “vital” for him to trust the people named as inspectors general, and “this is no longer the case with this inspector general.”
Atkinson was the first to report to Congress last year about an anonymous whistleblower complaint that described Trump’s pressure on Ukraine to investigate Democrat Joe Biden and his son. The complaint sparked a House investigation that ultimately resulted in Trump’s removal from office.
The Senate acquitted Trump in February.