Lindsey Graham actually said...

gathering intelligence is the most important activity in the law against radical Islam.

I think you are on solid ground, and this idea of an American citizen being an enemy combatant is part of the history of the law of war.

the law is well settled here, that a United States citizen in other wars have been held as enemy combatants when the evidence suggests they ...

I support this administration's effort to make sure we prosecute terrorism as a military action, not a law enforcement action.