No, it’s not: it’s alright to rat, but you can’t re-rat. She was a Republican then became a Democrat (at the height of the Reagan Revolution) and then later became a Republican again. The analogy isn’t to Reagan, it’s to Arlen Specter.
No, the analogy would be similiar to all of the Republicans who jumped to the Democrat party in the last presidential race to influence the Democrat party primary. In this instance she stated she jumped to influence one election. No different.
Nice try but no. Your argument is without merit. There are issues that could harm her, maybe, but this isn’t one and not evidence of a fraying campaign.