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.) said early Thursday he has "no idea" whether President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE will run for reelection in 2020.

Asked on CNN's "New Day" if he would support Trump in his reelection bid, Corker replied, “Look, who knows whether President Trump’s even going to run.”

CNN’s Alisyn Camerota pointed out that Trump has already announced his reelection campaign.

“Surely CNN is not taking for face value everything that comes out of the White House all of a sudden?” Corker asked.

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The retiring senator said that he’s “definitely not sure” if Trump will run.

“Any president that’s 18 months into their term, or 15 or 16 or 17, whatever it is, is likely to say that they’re going to run for reelection. They do not want to be viewed as a lame duck,” Corker said.

“So I take it with a grain of salt, it’s just another thing going across the internet,” he added.

Trump filed paperwork with the Federal Election Commission on Inauguration Day last year to launch his reelection bid.

His campaign raised $10 million in the first quarter of 2018, Trump campaign officials announced this week.