08/15/2013 06:00 am ET Updated Aug 15, 2013

Mitch McConnell Blasted On Social Security In New Ad From Left

The Progressive Change Campaign Committee began running a new television ad Thursday attacking Senate Minority Leader Mitch McConnell (R-Ky.) on Social Security.

The ad features Kirk Gillenwaters, a Kentucky labor activist who previously appeared in a radio ad against McConnell in 2008.

"I started working at the Ford plant in Louisville when I was 18 years old. After decades of hard work, I have some injuries. We work hard for these companies, and we're promised a secure retirement in return," Gillenwaters says. "Retirement is supposed to be promises made, promises kept. But our pensions are being cut and we need Social Security. When Senator Mitch McConnell supports cutting Social Security, he's breaking a promise -- and he's hurting our families. Senator McConnell -- if anything, we need to expand Social Security benefits, not cut them."

The Progressive Change Campaign Committee has spent just $21,000 on airtime, and the ad will be running through next week on all major Louisville broadcast stations, according to PCCC spokesman Matt Wall.

McConnell, like President Barack Obama, has voiced support for a proposal called chained CPI, which would reduce the cost-of-living adjustment for Social Security, effectively cutting benefits for future retirees.

"I think a place to talk is on things like chained CPI," McConnell told National Review in July.

The senator faces a potentially tough reelection battle in 2014 against Democratic candidate Alison Lundergan Grimes and tea party-backed primary challenger Matthew Bevin. McConnell is standing firm for federal spending cuts in the GOP's battle with President Barack Obama and the Democrats. However, polls have shown that chained CPI is unpopular with seniors.