The Senate Conservatives Fund's latest target is the GOP's leader in the Senate.
The conservative group has launched a radio ad in Senate Minority Leader Mitch McConnellMitch McConnellGOP vulnerables dial back Hillary attacks Top Lobbyists 2016: Hired Guns Republicans make M investment in Senate races MORE's (R-Ky.) district that scolds him for not supporting an effort that risks a government shutdown over funding ObamaCare.
According to The Associated Press, the ad highlights McConnell's reluctance to sign a letter in which he'd pledge his support to vote against any government funding bill that includes money for ObamaCare.
It also alludes to McConnell campaign manager Jesse Benton's comments — from a private conversation that leaked — in which Benton said he was "holding my nose" to work with McConnell.
"The ObamaCare bill stinks, and holding your nose won't make it any better," the narrator says.
The radio ad is backed by $50,000 and will launch Tuesday.
McConnell is facing a Tea Party challenge from Kentucky businessman Matt Bevin, and the polarizing issue of defunding ObamaCare — popular with the conservative grassroots — could become a difficult issue for him.
His campaign spokeswoman, Allison Moore, asserted in an email that it was "absurd" to suggest McConnell hadn't fought against the law.
"There is nobody in Congress who has done more to fight Obamacare since day one than Mitch McConnell and any assertion to the contrary is absurd," she said.
Moore also suggested that McConnell is working to "unite conservatives."
"Senator McConnell is a co-sponsor of the repeal bill, a
co-sponsor of the defund bill, and has said that if elected Majority
Leader getting rid of Obamacare would be the first thing on his agenda.
Senator McConnell's primary goal is to unite conservatives rather than
exacerbate differences to stop this train-wreck of a law and give us the
best chance for success," she said.
The Senate Conservatives Fund hasn't endorsed Bevin, but its continued attacks on McConnell are an indication they're moving closer to supporting his opponent.
The group has targeted six other GOP senators who, like McConnell, have not signed the defunding ObamaCare letter: Sens. Richard BurrRichard BurrGOP vulnerables dial back Hillary attacks Warren’s power on the rise Dem group knocks Burr over Medicare in NC Senate ad MORE (N.C.), Lindsey GrahamLindsey GrahamTrump on primary rivals who don't back him: 'I don't know how they live with themselves' The Trail 2016: Who is really winning? Graham: GOP Senate could rein in Clinton White House MORE (S.C.), Lamar AlexanderLamar AlexanderObama meets a crossroads for his healthcare law Music streamer Spotify joins Gillibrand’s push for paid family leave GOP senators avoid Trump questions on rigged election MORE (Tenn.), Johnny IsaksonJohnny IsaksonIs Georgia turning blue? GOP senators avoid Trump questions on rigged election Dems seek cash to expand Senate map MORE (Ga.), Jeff FlakeJeff FlakeReport: Investor visa program mainly funds wealthy areas High anxiety for GOP Five takeaways from final debate MORE (Ariz.) and Thad CochranThad CochranGOP senators avoid Trump questions on rigged election Momentum builds for Clyburn poverty plan 'Hardball' Pentagon memo creates firestorm MORE (Miss.).
Many Republicans oppose the strategy of threatening to shut down the government over defunding ObamaCare, arguing the GOP will take a political hit if voters are upset by the shutdown.
--This piece was updated at 1:14 p.m. to reflect comment from McConnell's campaign.