Story highlights Trump Arizona chairman accuses state GOP of cheating the billionaire's campaign

Only two of the state's 28 at-large delegates are Trump backers, DeWit says

Mesa, Arizona (CNN) Donald Trump's Arizona campaign chair on Saturday night accused Republican Party officials here of fixing the vote to favor Ted Cruz and his allies after winning only an estimated dozen of the state's 58 national delegates.

Jeff DeWit, the state treasurer, pointed to alleged flaws in the web-based application used by the Arizona GOP to handle the at-large delegate vote, accusing top officials of purposefully squeezing out would-be Trump delegates.

"Trump got cheated," DeWit yelled as supporters around him raged at the results. "Somebody messed with the system."

The billionaire businessman won the March 22 Arizona primary by more than 20 points, guaranteeing him the full backing of its large delegation on the first ballot in Cleveland. But the grinding battle to elect loyal delegates, whose support could prove crucial in the case of a contested convention, has in some states exposed organizational cracks in the Trump camp, which continues to struggle in its efforts to back up strong primary and caucus performances at state-level conventions and meetings.

Voting delegates at the gathering in Mesa were instructed by organizers to log on to NeverHillary.SimplyVoting.com, where they were presented with a selection of slates, including one strictly for Trump backers, a "unity" ticket featuring his supporters and top state officials, and two more for Ted Cruz and John Kasich, whose campaigns cooperated and presented nearly identical names.

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