I don't see any change to what she has always been and she will still caucus with Dems. This is likely something she has had planned for a long time, but could not have gotten elected as a independent. Now, she uses this to run like Bernie Sanders does, knowing she can count on the independent and some centrist GOP voters, while giving Dems no choice but to support her because the progressive wing in AZ is not strong enough to primary her.
It is still very self serving, but at least the cat is out of the bag now.
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