A lot of Senators have been allied with Trump very much in the Senate.
We know, Senator Graham was pivotal in getting Kavanaugh through. Rubio is said to largely influence Latin American policy, Paul on the Syria withdrawal, Cruz on the reform of health care, articles back all of these assertions up.
Some have been big team-players.
Articles mention specific cases:
Senator Rand Paul
Senator Lindsay Graham
Senator Ted Cruz
Senator Marco Rubio