But Sanders isn't the one who allegedly had an affair with Stormy Daniels.
At Wednesday's White House daily briefing, Sanders tried to fend off a barrage of questions about Daniels' lawsuit by claiming that the case had already been won by Trump in arbitration.
On Thursday morning, CNN reported that Sanders is in Trump's doghouse now.
"It seems the president is not very happy with her explanation of his involvement in this case involving Stormy Daniels," CNN's Abby Phillips reported from the North Lawn.
"Now a source close to the White House has told CNN's Jim Acosta that he's upset she went there in the briefing yesterday. In fact, this source says 'potus is very unhappy, Sarah gave Stormy Daniels, that storyline, steroids yesterday.'"
Trump blaming Sanders is in keeping with his history of throwing women under the bus over his own actions, as he repeatedly did with outgoing communications director Hope Hicks.
But it was Trump who allegedly engaged in an affair with Stormy Daniels, and Trump who must now answer questions about the $130,000 payoff that Trump's personal lawyer "facilitated" on the eve of the 2016 election.
Trump has at least three photo ops scheduled for Thursday, which will give reporters plenty of opportunity to pepper him with new questions about his misconduct. He won't have Sarah Sanders around to lie for him, or to take the blame.