Former White House communications director Anthony Scaramucci Anthony ScaramucciFormer DeVos chief of staff joins anti-Trump group Scaramucci to Lemon: Trump 'doubling down' on downplaying virus 'should scare' viewers Sunday shows - Leaked audio of Trump's sister reverberates MORE told Axios on Sunday that Republicans may need to find a candidate to replace President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE in 2020.

"We are now in the early episodes of 'Chernobyl' on HBO, where the reactor is melting down and the apparatchiks are trying to figure out whether to cover it up or start the clean-up process," Scaramucci, who was ousted from his job after 11 days, told the outlet.

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"A couple more weeks like this and 'country over party' is going to require the Republicans to replace the top of the ticket in 2020," he said.

Scaramucci, a prominent Republican donor, said that if Trump "doesn't reform his behavior, it will not just be me, but many others will be considering helping to find a replacement in 2020."

"Right now, it's an unspeakable thing," he continued. "But if he keeps it up, it will no longer be unspeakable. The minute they start speaking of it, it will circulate and be socialized. We can't afford a full nuclear contamination site post 2020."

Scaramucci's comments to Axios follow him last week calling Trump's visit to El Paso, Texas, to meet with survivors of a mass shooting a "catastrophe."

Trump fired back soon after, saying that Scaramucci "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."

Former Massachusetts Gov. William Weld William (Bill) WeldRalph Gants, chief justice of Massachusetts supreme court, dies at 65 The Hill's Campaign Report: Biden visits Kenosha | Trump's double-voting suggestion draws fire | Facebook clamps down on election ads Biden picks up endorsements from nearly 100 Republicans MORE is the only Republican to announce a challenge to Trump for the nomination so far.

Former South Carolina Rep. Mark Sanford Mark SanfordOn The Money: Business world braces for blue sweep | Federal Reserve chief to outline plans for inflation, economy | Meadows 'not optimistic' about stalemate on coronavirus deal Trump critic Sanford forms anti-debt advocacy group Republicans officially renominate Trump for president MORE (R) is also considering a possible candidacy.