Tennessee Republican Sen. Bob Corker is reconsidering his decision to retire this year and multiple sources told the New York Times that he's seeking President Trump's blessing to re-enter the 2018 fray.

Why it matters: Corker once referred to the White House as an "adult day care," (with Trump firing back) but he's been singing a different tune lately. Still, it's far from clear Trump would support him over Rep. Marsha Blackburn, a conservative firebrand and White House ally.

Micah Johnson, Corker’s spokeswoman, said that Tennessee voters are concerned about the possibility of a Republicans losing their razor-thin majority in the Senate if Corker retires.