Donald Trump gained ground in all four counties on the Arizona-Mexico border. Here's where his margin improved the most.

Arizona voters approved Proposition 314 but it remains unclear where it fits into Trump's mass deportation plans.

Proposition 314 makes it a state crime to cross the border unlawfully, allows police to arrest and deport migrants.

As Arizona political junkies feverishly refresh their screens for the remaining votes to be counted, the early numbers reveal ...

Voters in Arizona have approved a measure that would allow local police to arrest migrants suspected of illegally entering ...

Arizona voters are set to decide whether to let local police arrest migrants suspected of illegally entering the state from ...

Specifically, she said she hopes Trump will send more Drug Enforcement Administration agents to Arizona and now support the ...

Warren Petersen and Steve Montenegro were elected to lead the Arizona legislature's newly bolstered Republican majority.

Voters in Arizona, whose border with Mexico is on the front lines of dealing with illegal immigration, approved new state ...

The law enforcement provisions of Proposition 314 in Arizona are based on Texas Senate Bill 4, which is currently blocked from taking effect.

While supporters of the bill say it will help secure Arizona’s border, local police believe it’s a federal job that requires ...