Republican Sen. Jeff Flake
Jeffrey (Jeff) Lane FlakeProtesters who went viral confronting Flake cheered at award event Feinstein to introduce bill raising age to purchase assault weapons after California shooting Pollster says Trump unlikely to face 'significant' primary challenge MORE (Ariz.) was caught on a hot mic Saturday warning that the Republican Party will be "toast" if it becomes the party of President Trump
Donald John TrumpTrump rips Comey after CNN town hall: 'He brought the FBI down' White House says US, China trade talks to continue Friday Giuliani traveling to Ukraine to push for probes that could be 'very helpful' to Trump MORE and Roy Moore.
At a tax-reform event in Arizona on Saturday, Flake was caught on a live microphone by ABC affiliate KNXV bashing the president in a conversation with Mesa Mayor John Giles, a friend of Flake's.
"If we become the party of Roy Moore and Donald Trump, we are toast," Flake is overheard saying.
Giles, a moderate Republican who has been mayor of Mesa since 2014, is also heard on the recording making comments appearing to encourage Flake to mount a primary challenge against Trump in 2020.
"I am not throwing smoke at you, but you are the guy — just for fun, think about how much fun it would be — just to be the foil, you know, and point out what an idiot this guy is," Giles says, apparently referring to Trump. "Anyway, I hope you do it."
Flake has been a staunch critic of Trump, and announced in October that he would not seek reelection to his Senate seat in 2018.
In a speech on the Senate floor, he accused his party of abandoning its core principles.