That means little fundraising help from top Republicans in Washington, little to no engagement with the National Republican Senatorial Committee and a cold shoulder from Kentucky political strategists. And if you’re Texas Sen. John Cornyn, the NRSC chairman, no cross words about Bunning.

“The easiest way to get rid of him is not give him any money,” said one Washington-based Republican fundraiser.

Cutting off Bunning from the big money — while ignoring his outbursts on the campaign trail — may be the only hope for Republicans whose behind-the-scenes effort to force Bunning to retire have backfired. Calls for him to retire, and any recruitment of a primary challenger, will only embolden Bunning, Republicans say.