One Family Has Spearheaded Montana’s Unflinching Conservatism

During a legislative hearing in 2011 that was a prelude to Montana’s debates on abortion, State Representative Keith Regier displayed an image of a cow and made the argument that cattle were more valuable when pregnant.

The comparison drew a prompt rebuke from some women in the room, but Mr. Regier, a Republican, declined to apologize. Over the years, the former schoolteacher and sod farmer has seldom demurred from his growing brand of combative Christian-oriented politics, in which the Ten Commandments are the foundation of good law and some of the biggest battles have been with...