There's been a big development in a key Michigan House race that national Dems view as one of their ripest pickup opportunities.

Last month, the DCCC scored a major recruiting success by luring state Senate Minority Leader Mark Schauer into the race against vulnerable GOPer Tim Walberg. The remaining question for many Dems was whether the primary field would clear for Schaeur. Now, much to the delight of Dems, the last of the primary challengers has dropped out of the race.

National Dems view Walberg as vulnerable because they believe his extreme fiscal conservatism is out of touch with the generally moderate district and because the Dem challenger's base is in the heart of the district. What's more, Walberg had a very poor showing last time out -- he won the general election in 2006 by only 5% -- despite the fact that his opponent was badly under-funded.