A recent trip to Syria by the Speaker of the House has set off a debate over the role of legislators in conducting foreign policy.

Public disapproval of the Iraq war is starting to create fissures among Republicans and posing challenges for Democrats seeking to balance national security and political gains .

U.S. and Western military officials are calling on Iran to help stabilize Afghanistan, but historic tensions and allegations of arming militants raise doubts about Tehran’s intent.

Polls continue to show Democrats regaining control of at least one house of Congress in the November 7 elections. If this happens, they could exercise greater oversight of executive bodies and trade …

New screening measures at U.S. airports are being called overly intrusive by some passengers and civil rights groups. National security experts advise using a system that relies more on intelligence,…