He probably switched parties because he knew the Democrats would be “less judgemental” about his affair.
This whole Kline vendetta boils down, simply, as do a lot of issues, to abortion.
I know someone that is blindly, vehemently pro-abortion. She spat with disgust about Kline, and I asked her what he did to engender such hate, since he was just attempting to enforce the law.
“NO, he was interpreting the law”.
“How so?”
“I don’t know, he just was.”
I agree with you that abortion is a big part of the animus against Kline. As for Morrison, I've always had the impression that joining forces with Tiller, Planned Parenthood, et al. was an simply alliance of convenience for him to defeat Kline.