When Cruz and Rubio are eventually knocked out of the presidential race they can thank the ineptitude and cowardice of McConnell and the GOP leadership for it. This is why the Republican electorate is in rebellion against the elected representatives of their party.
Rubio, I can see. Cruz has spent a lot of time bucking the GOPe, and that is why he isn't so popular.
It's pretty stupid to throw him out with the people he has been fighting against.