Who has the power to declare war? As leaders use the word "war" in reference to Iran, here's what the Constitution says about Congress, the president and military authority.

Presidents have sidestepped Congress to launch limited military strikes for decades. Trump’s decision to attack Iran is an aggressive escalation.

As debate continues over the impact of recent U.S. and Israeli strikes on Iran, some people, including lawmakers, are questioning whether those actions follow the U.S. Constitution. Both President ...