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Why the state is significant:
Since 1952, the Grand Canyon State has voted Democrat only once, in 1996 when voters backed Bill Clinton.
In 1960, Arizona had four electoral votes, today, it has almost tripled to 11 because of the rapid population growth.
In 2012, Mitt Romney defeated rival, Rick Santorum in the Republican primary by a wide margin of 47-27 percent. In the general election, Romney beat Barack Obama in the Grand Canyon state by 9 percent.
Former Arizona Gov. Jan Brewer and anti-immigration sheriff of the state, Joe Arpaio, endorsed 2016 GOP presidential candidate Donald Trump.