More Arizona Republican early voting ballots have been cast for the upcoming primary by the state's largest county than were cast there for the entire 2012 contest as of Thurs., 3/17/16-NY Post

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249,703 Republican primary ballots have already been cast in Maricopa County as of 3/17/16.
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3/10/16, "POLL: Donald Trump on Track to win Arizona," MBQF Consulting, Phoenix, Az. (3/8/16 Arizona statewide poll)

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Maricopa County:

3/18/16, "Seems like Arizona Republicans can’t wait to vote for Trump," NY Post, Carl Campanile and Nolan Hicks

"Almost a quarter million Republican ballots have already been cast in Arizona’s largest county, potentially giving Trump a big leg up in the primary, experts say....

Statistics from Maricopa County, which includes Phoenix, show voters in Arizona’s largest county returned 

249,703 ballots in the 2016 GOP presidential primary as of Thursday,
more than the 

248,128 cast for the entire 2012 contest.

Arizona is a big prize because the winner collects all 58 of its delegates.

“This has really been a different election season,” said Helen Purcell, the Maricopa County Recorder."...

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Added: Following chart reflects statewide findings of 3/8/16 poll of likely Arizona Republican primary voters:

 











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