The effect of Trump being mentioned daily is that people (or should I say: men) that hardly follow the news think:
"He is mentioned a lot so he is important. He's powerful. I go for the important guy, the winner. Also: less taxes."
The more negative he goes the more he drags her down because people assume that there is always some form of balance between two choices.
If she manages to capture the narrative as in the first few days and after the debate Trump will drown in his shit.