> Boise is a prime example of political refugees running to a place because they love the current policies.
No, it's not; the people fleeing to Idaho for political reasons aren't going to Boise, the people going to Boise largely aren't doing it for political reasons.
> And then voting in people who enacted the types of policies that they ran away from.
That's pretty solid evidence that they aren't running away from the policies.
> The district I live in went completely Democrat for the first time in its history.
That's happened a lot of places recently, and has little to do with migration.
> It’s also making house unaffordable.
What's making housing unaffordable for people not participating in the boom is the inpouring of money chasing housing and the fact that the real housing market—everywhere, not just in Boise—has friction, creating supply limits in the short run that don't represent long-run capacity.