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Republican Presidential candidates Florida Senator Marco Rubio (L) and former Florida Gov. Jeb Bush gesture during the Republican Presidential debate sponsored by Fox News at the Iowa Events Center in Des Moines, Iowa on January 28, 2016. / AFP / AFP PHOTO / Jim WATSON        (Photo credit should read JIM WATSON/AFP/Getty Images)
Republican Presidential candidates Florida Senator Marco Rubio (L) and former Florida Gov. Jeb Bush gesture during the Republican Presidential debate sponsored by Fox News at the Iowa Events Center in Des Moines, Iowa on January 28, 2016. / AFP / AFP PHOTO / Jim WATSON        (Photo credit should read JIM WATSON/AFP/Getty Images)

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    Rubio and Bush argue over immigration

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Rubio and Bush argue over immigration

Speaking at the Fox News GOP debate, presidential candidates Sen. Marco Rubio and Gov. Jeb Bush disagree about how their immigration policies have changed over time.

Rubio and Bush argue over immigration

Speaking at the Fox News GOP debate, presidential candidates Sen. Marco Rubio and Gov. Jeb Bush disagree about how their immigration policies have changed over time.