I expect the US to recognize that the rights granted to its citizens by the Constitution are to be respected even when it's inconvenient to do so. I expect Americans to be granted a trial, be given access to attorneys, have the right to remain silent, to require warrants for their papers and possessions, and to be considered innocent unless proven guilty, even if they join ISIS and participate in genocide. Otherwise, the entire premise of a Constitutional government and the rule of law becomes a farce.

At the very least, I expect the US to not simply shrug its shoulders, decide it's too complicated and just kidnap and kill Americans instead.