MIAMI — Jeb Bush will be among the first speakers at the Hispanic Leadership Network's conference.

But most in attendance will be more interested in what the former Florida governor doesn't say Thursday night. Bush is one of a small number of Florida Republican politicians who has yet to endorse a presidential candidate ahead of Tuesday's primary.

Bush is conservative. His wife is from Mexico. He speaks Spanish and supports comprehensive immigration reform. All that makes him particularly popular with Florida's Cuban-Americans and other Latinos.

Presidential candidates Mitt Romney and Newt Gingrich will speak Friday at the daylong conference that covers immigration, industry and grassroots organizing. U.S. Sen. Marco Rubio will too. Republican leaders view the rising GOP star as key to their national efforts attract independent and undecided voters in November's general election.