Former Florida Governor Jeb Bush took issue with his party's immigration platform, saying that tough policies are costing Republicans elections.

"The most vociferous anti-immigrant kind of candidates lose," Bush said during a Bloomberg/Washington Post breakfast at the Republican National Convention in Tampa, Florida. "They lose in primaries, they lose in general elections. And I'm all about winning." Bush said Mitt Romney, who will accept the Republican presidential nomination, faces a "gap" among Hispanic voters that he can help bridge in his speech tonight by sharing more of his personal story and beliefs.

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As part of that story, Bush said Romney should discuss how his Mormon faith has shaped his life in positive ways. He said Romney's leadership in the Mormon Church is "something to be proud of." Bush said Florida's changing demographics, with an increasing Hispanic population, favors Democrats with voters even as recent polling shows Republicans have potential to make inroads.

Republican Bush, 59, served two terms as the governor of Florida, leaving office in early 2007. He is the son of former President George H.W. Bush and the brother of former President George W. Bush, who are both Republicans.

He forecast a close race between President Barack Obama and Romney in November.