DO NOT, under ANY circumstances let this lying, duplicitous creature caucus with the Senate Republicans. He is clearly a left wing operative and should stay with his fellow lefties, such as Schumer and Reid, in the Senate DemocRAT caucus.
If Mitch McConnell lets him in the Senate Republican caucus it will be obvious that he is looking for additional progressive support for the RINO wing.
That's what I don't get. If someone has to figure out who they will caucus with, then I don't see why the Republicans would want him. We have enough RINOs stabbing us in the back.