Primary Becomes Purity Test for a State G.O.P.: ‘You Can’t Serve Two Masters’

For years, Republican state legislators in Montana have been willing to team up with Democrats, but in nearly two dozen races on June 2, a nationally attuned right has those lawmakers in its sights.Brett Mills is one of nearly two dozen hard-right candidates in Montana who are challenging independent-minded Republicans in contested primaries on June 2.