They need to start taking away all committee assignments from Romney, Collins, Murkowski and Alexander, and tell them all they will have well-funded primary opponents backed by the NRSCC in their next election cycle.
Alexander is retiring. Romney doesn’t need money and is Senator for life from Utah due to his church. Murkowski already won one time with Democrat votes. Collins is almost certainly a goner in 2020 regardless.
It's McConnell who should be telling them that right now. And he has the power over the party machinery to back up his threats.
Mitch sinks our conservative senatorial candidates at will. If he wants you to lose your election, you will lose your election.
Mitch can do it. He doesn’t want to.
The Senate RINOs hate President Trump so much that they would try to screw him even if Mitch the Bitch had their families at gun point. They would simply tell him "to ahead and fire."