I'm scratching my head as to why, since the article says:
the Washington team is gearing up a new effort to protect incumbents and limit the ability of Republican voters to successfully challenge establishment candidates.
That’s the proof of our success: the RINOs are desperate!
I flat can’t understand how anyone could see that news to mean anything else (and no one has tried to tell me it does -to their credt).
And like most desperate ideas it won’t work.
Wherever they’re able to do this, if anywhere, third-party conservatives will emerge. Such candidates in the general election are more of a threat to them than in the primaries. They don’t have to win just get enough votes to defeat the RINO.