(CNN) - The current political fight over gun control is front and center right now in next year's re-election campaign for the top Republican in the U.S. Senate.
The Progressive Change Campaign Committee says it went up Monday with a new ad that criticizes Senate Minority Leader Mitch McConnell of Kentucky over his opposition to some gun control efforts in the wake December's mass shooting at an elementary school in Connecticut. And McConnell's re-election campaign is pushing back against the spot.
The liberal group says they'll spend $25,000 to run the commercial in several Kentucky TV markets and in the nation's capital, for one week. The ad highlights a Kentucky resident who introduces himself as a Vietnam War vet and hunter.
"I support the plan to ban assault weapons and keep 'em out of the wrong hands," says Gary Nutt of Cub Run, Kentucky. "Because I know these guns. I know what they can do. The NRA and the gun manufacturers have given a ton of money to Senator Mitch McConnell."
"And now he's blocking reform. Senator, whose side are you on?" says Nutt at the end of the spot.
The PCCC went up with another ad against McConnell earlier this month and says it has now spent a combined $100,000 on their campaign against the senator.
McConnell, who's running next year for a sixth term in the Senate, has criticized President Barack Obama and some Senate Democrats for their stance on gun control as he's reached out so far this year to supporters in Kentucky.
Meanwhile, Planned Parenthood also went up with an ad over the weekend that's critical of McConnell's stance on birth control, spotlighting his joining with 10 other GOP lawmakers to support a lawsuit by a company that seeks to avoid mandatory health coverage of birth control pills in its employee health coverage.
Planned Parenthood has not said how much money they're spending to run the ad in Kentucky.
McConnell re-election campaign manager Jesse Benton is pushing back against both groups.
"Senator McConnell is committed to protecting the Constitutional Rights of every single Kentuckian. Far-left George Soros funded groups are dead-set on eroding our rights and have put a big target on his back, but they will not weaken Leader McConnell's commitment to principle," Benton told CNN.
Soros has either personally–or through his foundation–contributed to both organizations.
While the 2014 election is still a long way away, the clock is starting to tick, and as of now no Democrat has announced a bid to challenge McConnell, although actress Ashley Judd is considering a run. Judd's family dates back generations in Kentucky. She spent much of her childhood in the state and graduated from the University of Kentucky. But she's lived in Tennessee for years and represented Kentucky's neighboring state when she attended the 2012 Democratic National Convention.
McConnell's campaign last week went up with an online ad that highlights the fact that Judd doesn't live in Kentucky.
– CNN Political Research Director Robert Yoon contributed to this story.