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 ...

Donald Trump has offered a sweeping immigration pitch that he has promised to begin on the first day of his presidency, ...

Former acting ICE Director Thomas Homan, appointed as Trump’s new “border czar," was once a special agent based in Phoenix.

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 ...