Rep. John Fleming (R-La.) won't challenge Democratic Sen. Mary Landrieu in 2014, he announced Thursday, citing a desire to avoid a competitive primary he says might allow the Democrat to win reelection.

“I’m grateful for the many Louisianians who have urged me to challenge Senator Landrieu in 2014. We share a desire to replace her in the U.S. Senate," Fleming said in a statement. "That desire is so strong, that for me to enter the race now would risk a contest between two experienced Republican Congressmen, potentially offering Senator Landrieu a path back to Washington. I can’t let that happen."

The GOP congressman Fleming is talking about is Rep. Bill Cassidy, who announced his Senate campaign on Wednesday. He's the first Republican candidate to enter the race.

Fleming joins Lt. Gov. Jay Dardenne and Rep. Charles Boustany, two potential GOP prospects who recently ruled themselves out.

Former congressman Jeff Landry, who lost to Boustany in a member-vs.-member race last year, remains a question mark on the GOP side at this point. He's left the door open to a bid.