Former GOP presidential candidate Herman Cain is endorsing a Republican in the race to unseat Sen. Bill NelsonClarence (Bill) William NelsonGingrich says arming teachers only long-term solution to school shootings Florida students turn to activism in wake of shooting CNN invites Trump to town hall with parents, students of Florida high school MORE (D-Fla.) — for the second time this cycle.

Cain originally backed Craig Miller, the CEO of Ruth's Chris Steak House, in early January. But weeks later, when it became evident that Rep. Connie Mack (R-Fla.) had amassed a considerable lead in the race, Miller dropped out and decided to run for the House instead.

This time, Cain is backing former Sen. George LeMieux (R-Fla.), who was appointed in 2009 to finish out the term of a retiring senator.

"This is the type of person that we need in Washington, D.C.  — people who are not afraid to challenge the establishment," Cain said in announcing his endorsement. "People who are there to represent the people and not represent politics. People who understand that it’s time that we stop shuffling the chairs on the deck of the Titanic and start solving stuff."

LeMieux is running behind Mack in the polls, and raised less than one-third of what Mack raised in the first three months of 2012.

Cain has been traversing the country since dropping out of the GOP race in December, using his Cain Connections PAC to back candidates who agree to sign on to his 9-9-9 flat tax plan. Miller and Rep. Pete Hoekstra (R), who is running for Senate in Michigan, both backed the 9-9-9 plan.

A LeMieux aide said unlike Cain's previous endorsements, this one did not include a pledge to back 9-9-9. The aide noted that LeMieux has his own "Four Freedoms" plan that includes tax reform.

This isn't the first time Cain has endorsed multiple times in the same race this cycle. After dropping out of the presidential primary, Cain initially said he wouldn't endorse. One month later, he curiously endorsed "the people." Less than two weeks after that, Cain backed Newt Gingrich.