The crux of this is that the presumptive appointee donated money to...a Super PAC supporting Mitt Romney's 2012 general election campaign. Not even the primary... a GENERAL election, as in, the one we had one chance to stop Obama with, and didn't.
Here's Gateway Pundit's (secondhand) source:
https://bigleaguepolitics.com/betrayal-democrat-party-donor-will-be-appointed-to-senate-by-georgia-governor-over-trump-favorite/Ironic how a site run by open homosexual Jim Hoft seems to have no problem carrying water for a site that calls women's basketball players "lesbianic thugs." They're attacking her for owning a WNBA team and using THEIR sins against her personally. This is hilarious.
If you want to criticize her for doing what most rich people do and bribing politicians of both political parties for favors, you'd be perfectly justified in doing so, but remember—Donald Trump himself regularly did the same thing in New York.