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What to watch for in Tuesday’s Arizona, Idaho and Utah primaries

Arizona, Idaho and Utah hold key contests that could determine if and when Clinton and Trump can clinch their respective parties' nominations.

Deborah Kelly, who waited in line 45 minutes to vote in the presidential primary election, shows her voting sticker outside a polling site in Glendale, Ariz., March 22, 2016. (Photo by Nancy Wiechec/Reuters)
Deborah Kelly, who waited in line 45 minutes to vote in the presidential primary election, shows her voting sticker outside a polling site in Glendale, Ariz., March 22, 2016.REUTERS

Perry Bacon

Andrew Rafferty