Conservative commentator Ann Coulter met with President Trump at the White House a few weeks ago and complained about his lack of focus on his base supporters, according to a report Tuesday night.

Coulter, a staunch Trump supporter, told the president he can't afford to lose his core supporters, the New York Times reported, citing two unnamed sources briefed on the meeting. She was reportedly brought in by Steve Bannon, Trump's chief strategist.

Last month Coulter tweeted that she is fed up with Trump for not keeping some of his campaign promises.

Their meeting came before Trump openly began criticizing Attorney General Jeff Sessions, who has strong conservative support and is also respected by the nationalist-populist movement that helped elect the president.

Trump's criticisms about Sessions began last week, when the president told the New York Times he was disappointed that Sessions recused himself from the investigation into Russian meddling in the 2016 election. Trump has since publicly criticized the attorney general on Twitter, calling him "beleaguered" and questioning why Sessions hasn't investigated Hillary Clinton.

The comments have stoked speculation that Trump may fire Sessions, or force him to resign. Sessions is so far vowing to remain attorney general.

Coulter lashed out at Trump over his treatment of Sessions on Tuesday, and called on him to "be a man" and fire the attorney general if he isn't happy with Sessions.