I think her populist attitude appeals to many Mountain West Libertarians. Obama and Sanders won that state in their respective primaries. Brian Schweitzer, who reminds me of Warren, is very left-libertarian leaning, too, and won the 2006 gubernatorial election in a landslide.
But maybe I'm just mistaken, since I have never been to Montana.
But populism and libertarianism are practically opposite philosophies.
Who wins the primary is no indication who is likely going to win or come close in the general election.
The gubernatorial elections in Montana occur in leap years. Schweitzer won gubernatorial elections in 2004 and 2008.