His ability to travel overseas should be immediately halted in regards to his capacity as a US Senator.
I think McCain should be censured and removed from any committees as well.
https://www.senate.gov/reference/reference_index_subjects/Censure_vrd.htm
McCain, secret-agent man, .0000007
Makes you wonder about these stories of him connected to Syrian war, ISIS, etc. Maybe he’s running some kind of SMERSH (Bond movie villain network).