I am not surprised. I always thought there had to be enough dirt on enough RINOs that they were NOT reliable to stick with the president. The obvious ones, Collins, Murkowski, Romney, can always count on someone doing some grandstanding....Paul, Lee, Portman, and now Gaetz.
OK, I have heard from our New York Morning drive time talk shows that Romney is actually going with the the rest of the GOP.
Susan Collins is simply being Susan Collins. In the end, she tends to vote with the rest of the party.