The new candidate is a little-known state lawmaker named Amanda Curtis.
With votes from two storm damaged precincts, the incumbent has beat Rep. Colleen Hanabusa.
"The status quo has got to go," said Palin, backing the Tea Party favorite.
The GOP Army veteran says she'll work across aisle to help others avoid the same fate.
College board to look into evidence and make recommendation on possible disciplinary action.
Businessman David Perdue leads Democrat Michelle Nunn by 47 percent to 40 percent.
Martin Matishak 08/15/14 11:10 AM EDT
Rep. Bruce Braley said the U.S. should not engage in "another long-term conflict in Iraq.”
Rancher Dirk Adams and Montana state Rep. Amanda Curtis are the only Montana Dems left.
A pair of hurricane-damaged precincts will decide Senate race between Schatz and Hanabusa.
The move is likely to set off renewed rounds of speculation about a presidential bid.