Graham is pointing this conversation toward us being in a state of war.
Points out past incidence of American citizens joining those involved in jihad.
OOH
"Enemy combatant"
"This war is not over - the war is coming back to our shores - just a matter of time before they hit us again"
"I hope we don't create a process where, if you come to America, you get a special deal which makes it harder for us to deal with you and find out what you know. We treat you as a common criminal, and not the warrior you've become. That's just my parting thought to you, and you'll decide the way you think is best for the country."
Setting the table with plates, napkins and silverware for military tribunals.