Why Arizona's GOP Primaries Are Crucial for November Elections

Arizona voters are heading to the polls tonight for the state’s primary election, a critical early test in one of America’s premier battleground states ahead of the November midterms.

Polls close at 7 p.m. local time, with results expected to begin rolling in shortly after.

This primary will determine Republican nominees to challenge Democratic incumbents in key statewide offices and settle crowded races for an open congressional seat that could influence control of the U.S. House.