BATON ROUGE - Term-limited Gov. Bobby Jindal says he won't endorse a candidate in the Nov. 21 runoff election to choose his successor. 

Jindal, a Republican running for the presidential nomination, said Friday that "voters can make up their own minds" without him announcing who he supports in the competition between Republican U.S. Sen. David Vitter and Democratic state Rep. John Bel Edwards. 

The governor and Vitter have had a frosty relationship for years. 

Also, it's unclear if Jindal's backing would help the Republican U.S. senator win office. Jindal is highly unpopular in Louisiana, and Vitter has run a campaign trying to distance himself from the governor.

However, Jindal rejected suggestions that his lack of popularity in Louisiana has made it tougher for a fellow Republican to win the governor's office.