From Politico:

Lyons’ research confirms that. “What we see in our survey data is that people who are moving here from California, Washington and Oregon tend to be Republican” — 55 to 60 percent, with 10 to 15 percent independent and 25 to 30 percent Democratic. Idaho and other mountain states beckon to those fed up with what they see as runaway regulation, taxation and disorder in a California where even Republican bastions like Orange County and San Diego have turned blue.