Democratic turnout is dramatically higher in Presidential elections than in mid-term elections. That enables Democrats to win many statewide elections in Montana. In 2012, Democrats Jon Tester, Steve Bullock, Linda McCulloch, Monica Lindeen, and Denise Juneau prevailed; only Pam Bucy and Kim Gillian lost.
In the 2014 midterm election, however, as displayed in the column graph below, low Democratic turnout resulted in big losses in the U.S. Senate and House of Representatives elections, and a 3:2 advantage for Republicans in both houses of the Montana Legislature.