West Virginia Senator Joe Manchin said Thursday he will not seek reelection in 2024. The conservative Democrat has earned millions of dollars from his family-owned coal business and is Congress’s largest recipient of fossil fuel industry contributions. Even as he announced his decision Thursday, Manchin appeared to leave open the possibility of a run for the White House.

Sen. Joe Manchin: “I believe, in my heart of hearts, that I’ve accomplished what I set out to do for West Virginia. I have made one of the toughest decisions of my life and decided that I will not be running for reelection to the United States Senate. But what I will be doing is traveling the country and speaking out to see if there is an interest in creating a movement to mobilize the middle.”

Manchin has received the support of the billionaire-backed organization No Labels, which is exploring whether to run a third-party candidate for president.