(CBS News) CORAL GABLES, Fla. - President Obama was in Miami for a town hall meeting on the Spanish-language network Univision. The latest Gallup poll shows the president leads among Hispanics nationwide, by a whopping 64 percent to 27. But on Thursday, he faced some really tough questions.

Back in 2008, the president told Univision he would introduce comprehensive immigration reform his first year in office. It never happened and on Thursday, he was asked repeatedly why he broke that promise. He laid the blame squarely at Republicans.

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