(FOX NEWS) - Donald Trump and Hillary Clinton will look to build their already-robust delegate leads in Western contests Tuesday night across three states -- with the marquee battle expected to be between GOP rivals Trump and Ted Cruz in delegate-rich Arizona.
The Arizona GOP primary looks custom-made for a Trump victory. The state has long dealt with illegal immigration problems, and the Republican front-runner's central campaign promise is to build a wall across Arizona and the entire southern U.S. border.
Trump also has the backing of former Arizona GOP Gov. Jan Brewer and Maricopa County Sheriff Joe Arpaio, two of the most outspoken voices on illegal immigration.
Yet even if Trump wins, Cruz appears poised to do well in Utah, which also votes Tuesday. Those two states -- plus Idaho -- are holding Democratic contests as well, as Bernie Sanders struggles against the odds to close his widening delegate deficit with Clinton.
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