Arizona’s two U.S. senators quickly emerged as the leading Republican opposition to President Donald Trump’s order suspending the admission of all refugees for 120 days and blocking the entry of citizens from seven Muslim-majority countries.

The Obama administration's fight against the Islamic State is at risk of becoming a "grinding failure for our nation," an influential Republican senator said Tuesday in a broadside that illustrated the mounting frustrations in Congress with the U.S. strategy to defeat the extremist group.

If your Arizona driver’s license expires April 1 or later, you’re going to have to decide whether you trust the federal government with your information.

A House Republican candidate is using video footage moments before the beheading of American James Foley in a campaign ad slamming Arizona Democratic Rep. Kyrsten Sinema as weak on national security.

The chief attorney for the city of Tucson is telling a judge that national security could be compromised if it is forced to disclose some documents about how it uses equipment it has purchased to track cell phone users.

Overwhelmed by a surge in illegal immigration, especially by unaccompanied children, the U.S. government has launched a $1 million international media campaign warning families in Central America that it's best to stay at home.

Several Arizona lawmakers have weighed in on the Obama administration’s weekend announcement of an agreement intended to limit Iran’s nuclear program – and most are not pleased.

When former Arizona Gov. Janet Napolitano stepped down as the Department of Homeland Security secretary in August, the reaction from policymakers along Arizona’s border with Mexico was mixed.

President Barack Obama has marshaled the likes of former California Gov. Arnold Schwarzenegger, the mayors of New York and San Antonio and Philadelphia's police commissioner in an attempt to show wide and varied support for an overhaul of the nation's immigration laws.

Officials at southern Arizona's Fort Huachuca are assessing how a federal government shutdown would affect activities at the military base.