Senators can and should still dissent, but not in front of the camera if it involves progress in an ongoing war. Checks still remain and the constitution is not trampled here. If they suspect a problem at Gitmo, they can order an inquiry from Senate chambers. If they think we are losing, they can present their case along with solutions to the appropriate committes, the Pentagon, the President. They still fund the war, they can still impeach.
The experimentation here is the high level of going to the media with complaints during time of war. I do not think our senators did this in WWII.
