While Senate Minority Leader Mitch McConnell and his Republican primary challenger in Kentucky hammer each other over the airwaves , a nonprofit group has launched another spot highlighting McConnell’s efforts to oppose the Obama administration.  

The Kentucky Opportunity Coalition, a 501(c)4, released Monday a 60-second radio touting McConnell’s Saving Coal Jobs Act. The ad is backed by a $75,000 buy.  

“Senator Mitch McConnell is fighting to save Kentucky jobs from Barack Obama’s job killing regulations, which have already cost us thousands of jobs and put families and communities at risk,” said Scott Jennings, a senior adviser to the group. Listen to radio ad here:  

https://www.youtube.com/watch?v=sSsDHabJTQA  

The spot comes on the heels of a December TV ad focused on Sen. Rand Paul, R-Ky., and McConnell’s efforts to repeal the president’s health care law. The group spent nearly $400,000 on that ad.  

Meanwhile, President Bill Clinton will make his first appearance of the 2014 midterms in Louisville Tuesday to stump with the likely Democratic nominee, Alison Lundergan Grimes, Kentucky’s secretary of state. While Obama will be counted on to help the party raise money , Clinton is likely to make many more campaign stops this cycle for House and Senate Democrats running in challenging territory for the party.  

Coal could play a leading role in the general election. But before facing Grimes, McConnell must first win the May 20 GOP primary against businessman Matt Bevin. The McConnell campaign has hit the challenger recently regarding questions about Bevin’s prior statements on support for TARP.  

The general election is rated Leans Republican by Rothenberg Political Report/Roll Call.