Sen. Cory Gardner (R-Colo.) told the Independent Journal Review Wednesday that he will support President Trump’s 2020 re-election bid, saying it’s the “right thing to do for Colorado.”

"Look, I’ve made it very clear that where I agree with the president, we will agree or where I disagree, we will disagree. But I’m going to fight like hell for Colorado. ... I know what Kamala Harris and I know what Bernie Sanders will do to Colorado, and that’s why I’ll be supporting the president."

Why it matters: Gardner, a "Never Trump" Republican who opposed Trump in 2016, is one of the most vulnerable senators up for re-election in 2020 in a state carried by both Hillary Clinton and Barack Obama. Maine Sen. Susan Collins, another vulnerable Republican who cast the decisive vote to confirm Supreme Court nominee Brett Kavanaugh last year, told IJR she's not ready to say whether she will endorse Trump.