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.) on Sunday was noncommittal when asked whether President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE should face a primary challenge in 2020, or whether the country would be better off with a Democratic president than a second term for Trump.

"I do think that we've got to remember what the Republican Party is," Corker told MSNBC's Kasie Hunt when asked whether Trump should face a GOP challenger in the next election.

"I want to get away from here and think about that," he added. "What is happening right now is not the standard Republicanism that we've had in our country for many, many years and it's very different."

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Corker also said he's not focused at this point on a possible presidential run.

"I think it's important to remind people that we're going through an anomaly right now as it relates to much of the standard Republican focus that's been around for a long time," he added.

The senator, who is retiring after opting not to run for reelection, noted that he supports certain aspects of Trump's presidency, such as the confirmation of conservative judges and the state of the economy.

Asked if the country would be better off with a Democrat winning the 2020 election, Corker did not explicitly rule it out, but expressed uncertainty that the party could elect a centrist.

"I don’t want to speak to that yet,” he said. “Let’s see what happens a year from now.”

WHOA.



Sen. Corker's answer on whether a Democratic president in 2020 would be better for the country than a re-elected Donald Trump pic.twitter.com/CoaNrwEh8J — Kasie DC (@KasieDC) December 16, 2018

Corker has been one of the most outspoken GOP critics of the president, likening the White House at one point to an "adult day care center" and saying Trump has "debased" the nation.

Trump branded the senator, who is 5 feet, 7 inches tall, as "liddle' Bob Corker" in response.

Some Trump critics in the GOP, including outgoing Sen. Jeff Flake Jeffrey (Jeff) Lane FlakeHow fast population growth made Arizona a swing state Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Republican former Michigan governor says he's voting for Biden MORE (Ariz.), have said they believe Trump should face a primary challenge in 2020.