No, but we do have precendent. The GOP-E refused to back a lot of the Tea Party candidates who beat their preferred RINOs in the 2010 primaries - heck, they openly backstabbed them. That showed many folks that for the GOP-E, party unity only applies when the RINO wins.
The GOP didn't back people that couldn't win. There is only so much money to go around, and you don't spend money on races you can't win. That's the way it goes. That idiot in Delaware comes to mind.