I thought we were talking about people living in the United States.
I can't imagine why anyone would think the Constitution applies to people who live in other countries,
actually, the SCOTUS is very close to declaring that foreign persons IN foreign countries, do get constitutional protections once they come under control of the US military of the CIA. what do you think about that?
The TSP Act only comes into play when a foreign terrorist is talking to a contact here in the States.
IOW, two terrorists talking to each other. That one happens to be domestic is beside the point.