“If you vote against us, you’re voting to keep Obamacare,” said Sen. Bill Cassidy of Louisiana, one of the bill’s namesakes, when asked about Paul’s intractable stance. “Period. End of story.”

“It just makes no sense,” griped another GOP senator. “It just makes me want to pull my hair out that Rand Paul would team up with Susan Collins to defeat this bill.”…

Interviews with more than a dozen Senate Republicans showed varying degrees of frustration with Paul’s latest crusade. Since the Obamacare repeal effort began this year, he has remained one of the most consistent headaches for GOP leadership in its quest for the elusive 50 votes to dismantle Obamacare.