A super-PAC backing Senate Minority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellSenate passes 0B defense bill Overnight Health Care: New GOP ObamaCare repeal bill gains momentum Overnight Finance: CBO to release limited analysis of ObamaCare repeal bill | DOJ investigates Equifax stock sales | House weighs tougher rules for banks dealing with North Korea MORE (R-Ky.) is out with a new ad attacking Kentucky Secretary of State Alison Lundergan Grimes (D) for backing President Obama's "anti-coal agenda."

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"ObamaCare. The War on Coal. That's Obama's agenda. And Alison Grimes supports Obama," the ad's narrator says before a clip of Grimes being asked if she supports the Democratic Party platform and agreeing that she does.

"After all the damage he did, Grimes embraced Obama’s platform and his re-election. Now his lieutenants are financing her campaign because Obama needs another vote in the Senate and with Alison Grimes, that’s what he’ll get," the ad concludes.

McConnell and Grimes are locked in a tight race, according to polls. The Kentucky Republican has had to keep one eye on his primary opponent, Matt Bevin and hasn't been able to turn his attention squarely to Grimes. The super-PAC's $500,000 ad buy helps provide cover while he does so.