The Democratic Congressional Campaign Committee moved Rep. Rick Nolan of Minnesota to its Frontline program — a reflection of growing concern over his re-election prospects.  

The Frontline program is for House Democrats’ most vulnerable incumbents.  

Nolan’s opponent for Minnesota’s 8th District is GOP businessman Stewart Mills. The move came after second-quarter campaign fundraising reports revealed that Mills raised more money than Nolan in April, May and June.  

“Rick Nolan is on the front lines of our fight to jumpstart the middle class and end the Republican handouts to wealthy special interests, so it’s no surprise that he’s under attack from his millionaire opponent who has made it clear he shares House Republicans’ wrong priorities,” DCCC Chairman Steve Israel of New York said in a statement.  

“Rick is a fierce campaigner and a champion for Minnesota’s middle class families, and we will not stand by and let an out-of-touch millionaire smear his record of protecting seniors and families,” Israel said.  

Mills is capable of self-funding a congressional campaign. But he outpaced Nolan in the money chase, even without donating his own funds to the campaign, according to CQ Roll Call’s House Fundraising Chart .  

The race is currently rated Leans Democratic by Rothenberg Political Report/Roll Call.  

On a late Friday afternoon in March, Democrats added Rep. Nick J. Rahall II of West Virginia to the Frontline program.