Fine. May the next fascist move hit you a bit harder.
https://www.youtube.com/watch?v=G2y8Sx4B2Sk
It's the Republican Party. They can do whatever the hell they want. However...
At the point where people decide that said party no longer best represents their interests, they can feel completely free to leave it.
For me, that will be when the Kasich-Ryan (or vice-versa) ticket is trotted out, to maximize the message that I wish to send to that bunch of Vichy Democrats.