Like college students submitting last-minute classwork, candidates scurried to the Minnesota secretary of state's office to file their official paperwork before Tuesday's deadline.
The close of filing highlights a few trends that will keep voters watching through the year:
U.S. House primaries
Voters in August will decide which Democrat will challenge U.S. Rep. Chip Cravaack, a Republican, for northern Minnesota's Eighth District and which Republican will challenge U.S. Rep. Tim Walz, a Democrat, for southern Minnesota's First District. Republicans Allen Quist and Mike Parry are vying to take on Walz; DFLers Rick Nolan, Tarryl Clark and Jeff Anderson are battling over who will run against Cravaack. Neither Cravaack nor Walz has primary challenges.
Five sitting members of the U.S. House -- Republicans John Kline, Michele Bachmann and Erik Paulsen and Democrats Betty McCollum and Keith Ellison -- will have primaries. None of the challengers to those five has raised significant resources or has large a campaign organization.
Legislative primaries
Rep. Connie Doepke, R-Orono, will run for state Senate against the GOP-endorsed candidate, David Osmek.
Rep. Steve Smith, R-Mound, will run for his seat in a primary against Republican-endorsed Cindy Pugh. Smith, trying for an 11th term, lost his committee chairmanships last session and failed to get endorsement.