The Democratic Congressional Campaign Committee is using its first independent expenditure TV ad of the cycle to challenge former local District Attorney Sean Duffy (R) on Social Security.

“Politicians like Sean Duffy just don’t get it,” a narrator says in the new ad. “When we should be fighting to protect Social Security, Sean Duffy backed a plan to privatize it.”

The ad ties Duffy to Wisconsin Republican Rep. Paul Ryan’s budget proposal, which would create private accounts for Social Security. In Wisconsin’s 7th district, where Duffy is running for Congress, 15 percent of the population is older than 65.

The ad will air in the Wausau-Rhinelander market starting Tuesday.

Duffy is running against state Sen. Julie Lassa (D) for the seat being vacated by retiring Rep. David Obey (D). Lassa aired her first TV ad last week, focusing on cleaning up Washington. Duffy has not run any ads yet.

Both Duffy and Lassa are heavily favored to win their respective primaries Sept. 14.

A spokesman for the National Republican Congressional Committee called the DCCC ad “deliberately misleading” and an attempt to distract voters from Democrats’ record in Washington, D.C.

“As Sean Duffy has stated on several occasions, he is 100% committed to protecting Social Security,” Tom Erickson said in a statement. “In fact, Julie Lassa is the only candidate in this race that Wisconsin seniors need to fear as she has endorsed the Democrats’ efforts to slash hundreds of billions of dollars from Medicare to pay for their government takeover of healthcare.”

The 7th district race is the most competitive House contest in Wisconsin this cycle.