"They have to protect the top leadership of this country at the same time when there are massive challenges for morale, funding, training and coordination with other [law enforcement] agencies.
"I hope Director Curran is up to the job."
Curran is "the quintessential outside-insider," according to Jonathan Wackrow, one of former President Barack Obama's body men.
"He understands the service intimately, but he's not biased by its bureaucracy," Wackrow told the Post.
Trump has credited Curran and others for saving his life.
"He proved his fearless courage when he risked his own life to help save mine from an assassin's bullet," Trump wrote in a Truth Social post Jan. 24.