Washington (CNN)Anthony Scaramucci, a former White House communications director who has frequently defended President Donald Trump on television, said Monday he no longer supports Trump's reelection bid and that the top of the 2020 Republican presidential ticket may need to be replaced.
"For the last 3 years I have fully supported this President".
"Maybe he'll tweet something negative about somebody for saying he didn't do well", Scaramucci said Thursday on MSNBC.
Scaramucci said in response that Trump will "eventually" turn "on everyone".
Asked if he was calling for a change to the Republican nomination for president, Scaramucci said: "Well, I'm calling for it to be considered, yes".
Touting his accomplishments in office, Trump said he made Scaramucci's career: "Anthony, who would do anything to come back in, should remember the only reason he is on TV, and it's not for being the Mooch!" But he predicted that others would join him in considering an alternative if the president "doesn't reform his behavior". "So, let's just stop for a second and think about this".
On Monday, Scaramucci also cited Trump's combative tactics on Twitter. Scaramucci, who served as White House communications director for just 11 days, suggested the president will one day "turn" on those he claims to be fighting for. "Like many other so-called television experts, he knows very little about me other than the fact that this Administration has probably done more than any other Administration in its first 2 1/2 years of existence".
Shootings in El Paso, Texas, and Dayton, Ohio, that killed 31 people have fueled criticism that Trump hasn't done enough to stem gun violence and has instead fostered extremism. He described the visits as a "catastrophe".
This followed an Axios interview where Scaramucci compared Trump to the nuclear reactor meltdown Chernobyl.
"He goes after individuals as the president of the United States on his Twitter account, okay, which incites hate, which incites death threats", he said.
White House press secretary Stephanie Grisham responded to Scaramucci's comments by saying, "It sounds like his feelings are hurt".