White House adviser Kellyanne Conway said late Sunday that she will be leaving the administration of U.S. President Donald Trump at the end of August, citing the need to focus on her family.

"I will be transitioning from the White House at the end of this month," she said in a statement.

Her departure, about two months before Trump seeks re-election, comes at a crucial time for the president. It leaves him without one of his more passionate articulators of his political and policy choices.