US presidential front-runners, Democrat Hillary Clinton and Republican Donald Trump, have continued their winning streaks, taking Arizona.
The issue of immigration loomed large in the south-western state, the biggest prize in the latest round of contests.
Polls showed that Mr Trump's anti-immigration message resonated with the state's conservative voters.
With Arizona's growing Latino population, Mrs Clinton continued her success by courting minority voters.
Keeping his campaign in the race, Democrat Bernie Sanders decisively won caucuses in two smaller states, Idaho and Utah.
Texas Senator Ted Cruz was also favoured to win the Republican caucuses in Utah.