Mitt Romney will pick up the ultimate Cuban-American endorsement trifecta Tuesday in South Florida: The support of U.S. Reps. Ileana Ros Lehtinen and Mario Diaz-Balart, and his brother, former Congressman Lincoln Diaz-Balart.

The endorsements of the Miami Cuban-American leaders is a leading indicator that Romney is making a big push in Florida for one of its most crucial voting blocs in the state's Republican primary, scheduled for Jan. 31.

"It's a major boost for any candidate when the three of them get together and move in one direction," said Carlos Curbelo, a Miami-Dade School Board member who has worked for the Diaz-Balart brothers but has endorsed Romney rival Rick Perry.

"They represent this community," he said. "In Miami-Dade, their support is crucial."

Story here.