Attorney General Jeff Sessions has bowed to pressure to remove himself from an FBI inquiry into alleged Russian meddling in the US election.
America’s top prosecutor said he did not lie when he testified at a January confirmation hearing that he had “no communications with the Russians”.
But Democrats are demanding he quit after it emerged he met Moscow’s envoy during last year’s White House race.
Claims of Kremlin interference have dogged President Donald Trump.
“I have decided to recuse myself from any existing or future investigations of any matters related in any way to the campaigns for President of the United States,” Mr Sessions said in a statement.