ST. PAUL (AP) - Representative Chip Cravaack unseated 36-year Democratic incumbent Jim Oberstar last year in northeastern Minnesota.

Now the conservative Republican is considered the state's most vulnerable member of Congress and a national target in 2012.

Democrats are lining up to run against him. Outside groups are helping organize opponents to attend his local appearances. His family moved to New Hampshire, raising pressure to show he remains connected to the 8th District.

Democrats including Duluth City Councilor Jeff Anderson, former state Senator Tarryl Clark and former U.S. Representative Rick Nolan are running to unseat Cravaack.

Cravaack could be helped if the courts redraw the state's northern congressional districts to put him in a new, more conservative central Minnesota district. But those boundaries won't be known for months.

(Copyright 2011 by The Associated Press. All Rights Reserved.)