Former U.S. Attorney Booth Goodwin plans to discuss his run for West Virginia governor.
The Democrat's campaign says Goodwin will be joined by supporters as he launches his campaign on Wednesday in Charleston.
According to the Secretary of State's website, Goodwin filed precandidacy papers Friday, four days after announcing that he was stepping down as the top prosecutor in southern West Virginia.
Goodwin will join billionaire coal businessman and owner of The Greenbrier resort Jim Justice and state Senate Minority Leader Jeff Kessler in the Democratic primary in May.
West Virginia Republicans largely have unified around state Senate President Bill Cole.
Goodwin's resignation came less than a month after the federal trial of ex-Massey Energy CEO Don Blankenship.