WASHINGTON -- Republican Stewart Mills III, who is running to unseat Rep. Rick Nolan in the 8th Congressional District, launched his first ads this week in a substantive buy on television in Duluth and the Twin Cities against Obamacare.

"Every day I see how Obamacare is hurting small businesses and the middle class," Mills says, after saying he grew up in the family company stocking shelves and mopping floors. "As your congressman I'll replace it."

The campaign declined to give specifics but a Democratic source says the campaign sunk $170,000 in the buy on cable and network television in Duluth and Minneapolis/St. Paul. It is scheduled to run through July.

In last campaign finance reports, Mills reportedly had $350,000 cash on hand. His portion of his family's farm business is worth between $41 million and $150 million.

"It's clear why millionaire Stewart Mills is avoiding the issues and hiding behind his TV ads, because when the cameras aren't rolling he says what he actually thinks," said Brandon Lorenz of the Democratic Congressional Campaign Committee.

This is the latest ad in the putative fight this fall between Republicans and DFLers over Obamacare. Last week, Mike Obermueller, who is running against GOP incumbent Rep. John Kline, launched a pro-Obamacare ad in a tiny ad buy on MSNBC.