(CNN) - Jim DeMint's political operation is firing back at anonymous Senate Republican aides who criticized the conservative South Carolina Senator on Tuesday night for helping Christine O'Donnell capture the GOP Senate nomination in Delaware, possibly jeopardizing the party's chances of winning the seat in November.
One unnamed senior GOP aide told CNN's Dana Bash: "I wonder who Harry Reid and Chuck Schumer are calling first tonight - Chris Coons for becoming the next Senator from Delaware or Jim DeMint for helping to make it happen.
Another GOP leadership aide griped to Hotline On Call that "DeMint is not interested in a majority, he'd rather establish himself as the leader on the fringe."
DeMint's Senate Conservatives Fund directed money to O'Donnell's campaign and numerous other conservative Senate hopefuls who knocked off establishment-backed candidates in GOP primaries this cycle.
A spokesman for the group, Matt Hoskins, responded to the criticism - on the record.
"Based on the number of Republicans DeMint has helped get elected this year, I would say he's done quite a bit to elect a majority," Hoskins told CNN. "Perhaps the real reason some unnamed leadership aides are upset is that these Republicans actually have principles."