Question: The 1916 Montana gubernatorial election took place on November 7, 1916, after comfortably winning the Democratic primary, he advanced to the general election, where he faced Frank J. Edwards, the former Mayor of Helena, the capital city of the U.S. state of Montana, and the county seat of which county?
Sentence (from "Helena, Montana"): As of the 2010 census the population at 28,190, making it the fifth least populous state capital in the U.S.
Relevant evidence: No