President Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE thanked two Republican senators on Friday after they offered an early endorsement of his reelection run despite not supporting him for office in 2016.

In a tweet Friday afternoon, the president thanked Sens. Cory Gardner Cory Scott GardnerGraham: GOP will confirm Trump's Supreme Court nominee before the election Gardner signals support for taking up Supreme Court nominee this year Tumultuous court battle upends fight for Senate MORE (R-Colo.) and Rob Portman Robert (Rob) Jones PortmanMcConnell locks down key GOP votes in Supreme Court fight Romney undecided on authorizing subpoenas for GOP Obama-era probes Congress needs to prioritize government digital service delivery MORE (R-Ohio) after the two told right-leaning news site Independent Journal Review they would back his reelection in 2020.

"Thank you to Senator Rob Portman and Senator Cory Gardner for the early and warm endorsement. We will ALL WIN in 2020 together!" Trump tweeted.

Thank you to Senator Rob Portman and Senator Cory Gardner for the early and warm endorsement. We will ALL WIN in 2020 together! — Donald J. Trump (@realDonaldTrump) February 1, 2019

Portman and Gardner both declined to support Trump in 2016, with Portman withdrawing his support following the release of an "Access Hollywood" tape in which the president makes lewd comments about women. Gardner at the time called for the GOP to replace Trump with a candidate who could defeat his then-opponent, 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 (D), in the general election.

The two said this week that they had both made up their minds to support Trump after viewing the field of likely Democratic candidates running in 2020.

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“Look, there are things here — look, I’ve made it very clear that where I agree with the president, we will agree or where I disagree, we will disagree,” Gardner told IJR. “But I’m going to fight like hell for Colorado, and we’ve done some good things for Colorado."

“I know what Kamala Harris Kamala HarrisJoe Biden looks to expand election battleground into Trump country Fox's Napolitano: Supreme Court confirmation hearings will be 'World War III of political battles' Rush Limbaugh encourages Senate to skip hearings for Trump's SCOTUS nominee MORE and I know what Bernie Sanders Bernie SandersJacobin editor: Primarying Schumer would force him to fight Trump's SCOTUS nominee Trump campaign plays up Biden's skills ahead of Cleveland debate: 'He's actually quite good' Young voters backing Biden by 2:1 margin: poll MORE will do to Colorado, and that’s why I’ll be supporting the president,” he added.

Gardner, who beat an incumbent Democrat in 2014, faces a tough reelection race in a state Clinton won in 2016. Portman outpaced Trump in Ohio when he won his 2016 reelection race.

“I intended to support the Republican incumbent,” Portman added to IJR. "What changed? Well, he’s the incumbent. I mean, he’s in office, I work with him every day. I disagree with him publicly and privately when appropriate. But I also get a lot done, and I get that done with him. So we work with the White House, and I think that’s important for Ohio."