The Senate Conservatives Fund called opposition by Senate Minority Leader Mitch McConnell (R-KY) and Minority Whip Sen. John Cornyn (R-TX) to a continuing resolution measure that also defunds Obamacare "the ultimate betrayal."
On Tuesday the fund sent out an email targeting Cornyn and McConnell, the two highest ranking Republicans in the Senate.
"We knew Mitch McConnell and John Cornyn weren't with us when they voted to fund Obamacare earlier this year," Senate Conservatives Fund Executive Director Matt Hoskins wrote in the email. "But then, under pressure from grassroots, they said they supported the effort to defund it. They even ran political ads in their home states to make voters think they were on their side.
"But now, faced with the prospect of having to fight for the things they claim to believe, these Senate leaders have surrendered," Hoskins continued.
"Mitch McConnell and John Cornyn have surrendered to Barack Obama, Harry Reid, and the Democrats. More importantly, they have surrendered to Obamacare -- the biggest job killer in America," Hoskins concluded in the email.
The Senate Conservatives Fund has long been critical of McConnell and Cornyn for, in the group's opinion, insufficient support for defunding Obamacare. On Monday McConnell and Cornyn both announced they would not engage in an effort to block the Senate from moving forward with a continuing resolution bill that defunds Obamacare. That decision gives Senate Democrats a wide opening to pass the measure and then remove the defunding provision.