The Big Issue Haunting Top Republican Presidential Hopefuls This Weekend

Hillary Clinton's immigration plan has trumped Jeb Bush and Marco Rubio.

NEWARK, NJ - NOVEMBER 20: Immigrants take oath of citizenship to the United States on November 20, 2014 in Newark, New Jersey. Sixty immigrants from 25 countries became American citizens during the naturalization ceremony at the U.S. Immigration and Citizenship Services (USCIS) office at Newark's Federal Building. (Photo by John Moore/Getty Images)

John Moore/Getty Images

Immigration.

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