Republican Ryan Zinke won the race to replace Rep. Steve Daines.
Republicans are stepping up their efforts to use the delay to their advantage.
Several 2014 candidates are emphasizing business experience over political records.
Democrats say they now have better odds at winning seats in Montana and Louisiana.
Senate Majority Leader Harry Reid (D-Nev.) set up a procedural vote on a bill that would end tax...
Six House Republicans who are running for Senate this year in competitive states voted for the...
The early vacancy has Dems more hopeful about chances to hold Senate seat.