Polls have closed in Nevada, Montana and Utah, along with portions of Idaho and Oregon.Key races to watch:Nevada Governor: Joe Lombardo (R) vs. Aaron Ford (D).Nevada House races: Competitive seats that contribute to the national House picture.MT-01: A competitive House district in western Montana.Montana Senate: A three-way contest involving Kurt Alme (R), Alani Bankhead (D) and independent Seth Bodnar.What to watch: Clark County, Nevada, home to Las Vegas and roughly 70% of the state’s electorate. Its returns will provide important context for the gubernatorial contest.