That's made it difficult for Florida Republicans: They need to appeal to the GOP base in a primary but can't risk alienating Hispanic voters -- especially the largely Puerto Rican bloc around the I-4 corridor -- who are crucial in winning general elections. Mack's major primary opposition is coming from former Sen. George LeMieux and former state House Majority Leader Adam Hasner. LeMieux has been under fire from the right for his close ties to former Florida Gov. Charlie Crist, who left the Republican party last year. Hasner has been rallying support with conservatives, but has struggled with fundraising and still lags in early polls.
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