Cravaack's Opposition

(AP)  Minnesota's 8th District Congressman Chip Cravaack is considered the most vulnerable of the state's delegation. 

The freshman Republican knock-off 36 year veteran Jim Oberstar last year.  Now, DFL-ers are getting in line to challenge him, including former Congressman Rick Nolan and former state Senator Taryl Clark. 

Outside groups are organizing opponents to attend his events at local appearances.  Cravaak's family has moved to New Hampshire, raising pressure to show he remains connected to the 8th District.

Cravaack would be helped if the courts redraw the state's northern congressional districts to put him in a new more conservative central Minnesota district.  It will be several months before the court's decision is handed down.