Republican U.S. Sen. David Vitter will be a candidate in Louisiana's 2015 governor's race.
Vitter announced his plans in an email to supporters on Tuesday, saying "I believe that as our next governor, I can have a bigger impact addressing the unique challenges and opportunities we face in Louisiana."
The Associated Press obtained the announcement from Vitter's staff.
Vitter's announcement ends months of speculation. His decision is expected to influence which other potential candidates enter the race.
Gov. Bobby Jindal is term-limited.
Republican Lt. Gov. Jay Dardenne has said he will run for governor, along with state Rep. John Bel Edwards, chairman of the House Democratic Caucus. Others are considering the position.
Vitter can run for governor without forfeiting his current position, which isn't up for re-election until 2016.