Rex Tillerson: “We take the relationship with Russia as serious. They are a global nuclear power.”

The 2001 AUMF provides statutory authority for ongoing U.S. military operations against al-Qaeda, the Taliban, and associated forces.

The President got tired of me being the guy who had to tell him, no, Mr. President, you can't do that, it's illegal.

Interim local political arrangements that give voice to all groups and ethnicities supportive of Syria's broader political transition must emerge with international support.

I know the Senate's desire to understand the United States' legal basis for military action is grounded in your constitutional role related to foreign policy and national security matters.