Growing up in Bozeman, Mont., Dylan Heintz loved the picturesque views of the snow-capped mountains and the small-town charm. Things were cheap: His dad bought the family home for about $80,000. Drawn by Montana’s natural beauty and easy access to outdoor activities, the newcomers have created an affordability crisis and a local backlash that are transforming the state’s economy and politics. “I love this place, but it’s just a tough place to live in,” said Mr. Heintz, 28, an auto body repairman. “There are a lot of out-of-staters that have some money, and they’re willing to pay above asking price.

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Persons: Dylan Heintz, Bozeman, “, ”, Heintz, Jon Tester, Tim Sheehy Organizations: Big Sky, Foods, Senate, Democratic, Navy SEAL, Republican Locations: Bozeman, Mont, Florida, —