Associated Press
Herman Cain arrives at the Cistern with Stephen Colbert on the College of Charleston campus for the \"Rock Me Like a Herman Cain South Cain-olina Primary Rally\" at the College of Charleston in Charleston, S.C., on Friday, Jan. 20, 2012.

WEST PALM BEACH, Fla. — Former presidential hopeful Herman Cain is backing Newt Gingrich's White House bid.

Cain endorsed his fellow Georgian Saturday, just days before Florida's primary, at a GOP fundraiser.

Gingrich was also slated to speak to the group later Saturday night.

Gingrich, a former House speaker, is in a fierce fight for Tuesday's Florida's GOP primary with Mitt Romney.

Cain, a favorite of the tea party and a former pizza executive, left the race before the first nominating contests facing accusations of unwanted sexual advances. He remains popular, however, and would be a late boost for Gingrich.