Outgoing Sen. Jeff Flake Jeffrey (Jeff) Lane FlakeJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Republican former Michigan governor says he's voting for Biden Maybe they just don't like cowboys: The president is successful, some just don't like his style MORE (R-Ariz.) said on Wednesday he did not vote for President Trump in the 2016 presidential election, just one day after he ripped the president on the Senate floor and announced he would not be seeking reelection.

"I didn't vote for this president last November," Flake told NBC's Matt Lauer on "Today," adding that he did not vote for Democratic nominee Hillary Clinton Hillary Diane Rodham ClintonJoe Biden looks to expand election battleground into Trump country Biden leads Trump by 12 points among Catholic voters: poll The Hill's Campaign Report: Biden goes on offense MORE either.

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"I am a Republican. I am a conservative. I would love to have a Republican president, but not at any cost," he said.

Flake would not say whether he thought it would be better if Clinton had become president.

"I can tell you no president, Democrat or Republican, in recent memory has exhibited the kind of behavior that this president has," the senator said.

Flake's comments come just one day after he announced he would be leaving the Senate when his term ends in 2019 and tore into the president in a scathing speech on Capitol Hill.

The Arizona senator characterized Trump's behavior as “reckless, outrageous and undignified behavior has been excused.”

Flake joined retiring Sen. Bob Corker Robert (Bob) Phillips CorkerHas Congress captured Russia policy? Tennessee primary battle turns nasty for Republicans Cheney clashes with Trump MORE (R-Tenn.) in attacking Trump.

“I think at the end of the day, when his term is over, I think the debasing of our nation, the constant nontruth-telling, the name calling ... the debasement of our nation will be what he will be remembered most for, and that’s regretful,” Corker told CNN’s Manu Raju.

Trump hit back at the two senators in a tweet on Wednesday, saying they had "zero chance" of being reelected in 2018.