Looking over commentary on several conservative news/commentary sites, it looks like TG hit Kammy on the contradiction between what she did as SF's DA and what Kammy now says.
Kammy is, in part, running on her record. There is much in Kammy's record as SF's DA and CA's AG that would make a good little Proggie's toes and hair curl. It may not prevent Kammy getting the nomination, and Dems are not likely to vote Trump over Kammy, but her record might dampen Progs' enthusiasm. Kammy's sole "principles" are lust for power and expediency, and some Dems may recognize and squirm over that.