Another anonymous asks: "Do you think true political re-alignments are possible anymore?"
Here's one where there's a good answer available: True party re-alignments, with Critical Elections and the rest of it, were basically a myth. You'll want to read David Mayhew's book explaining it.
Now, groups do have voting patterns, which can change over time, and demographic changes within states can change voting patterns in states or regions. So, for example, West Virginia has moved from a strong Democratic state in presidential elections to a strong Republican state over the last twenty years (although note that Democrats still win statewide offices there, so perhaps it's too soon to tell what's going on).
So those kinds of changes are certainly very possible; it's not at all hard to imagine, say, that Cuban-Americans could change their political alignment rapidly in response to a major change in Cuba, for example, with important consequences for Florida (and therefore the Electoral College). But the other thing doesn't really happen now because it never really happened.