No. Treason is tightly defined in the Constitution and under the law, and this is not treason.
Violation of Oath?
No. This is just politics.
Can he be recalled?
No. Senators and congressmen cannot be recalled. This has been litigated in federal court (Idaho, 1967) and state court (New Jersey, 2013).
Prosecuted?
No. There is no crime.
What the A hole did was give cover for the rinos who would have loved to vote against the repeal BUT knew if they did they would be driven from office. I guess Murkowski believes she has enough clout to win in Alaska and Collins the same in Maine. IOW, screw those they told they would take it out because they do not believe that is the correct thing to do. They need ask themselves, if they were so certain for O care, why did the Dems wait till they had the 60 votes to proceed when Stuart Smally got elected in Minn to push this crap.
Judging from the scar above his left eye, the process is well on its way............