They switched party registration.
But that left them unable to switch back for the general. But they could care less.
It’s not “theory”, it’s documented fact, posted to FR years ago.
It’s not “theory”, it’s documented fact, posted to FR years ago. This doesn't appear to be true.
Here's a link that has historical voter registration for AZ.
You can see there was no massive uptick in Democratic voters in AZ from 2009-2010. Also, Republicans outnumber Democrats in AZ, so what you're saying just doesn't sound plausible.
Can you provide any source for your claims?