James Wesley Rawles a very vocal Calvinistic protestant who runs survivalblog.com started the concept of the American Redoubt. He is encouraging traditional, conservative Christians and Jews to move to the Pacific Northwest in five low density states, Idaho, Montana, Wyoming, eastern Oregon, and eastern Washington. I personally would include Northern Utah in the American Redoubt. The American Redoubt is a modern approach to an old concept of political and religious migration. This is nothing new. At the beginning of our country Protestants Christians of European heritage migrated to what is now the United States to escape primarily non-responsive Catholic governance. Mormons kept migrating westwards to current day Utah to escape non-responsive Protestant governance. There are many other historical examples of political and religious migration. The American Redoubt can be viewed as traditional Christian and Jews migrating to escape non-responsive militant Secular governance as demonstrated by “deep blue” states.
I am adding this link as several people have asked for it. Here is a very complete look at why these specific states where choose.