I can see Hillary refusing to debate Trump because, she’ll say, he’s outside the pale of civilized discourse. She can’t defend her husband’s activities so she’ll sidestep the debate.
If she pulls that, what you wanna bet that he will do it all by himself. The media couldn’t turn down the $$$. Perhaps have the VP nominee stand in... He’ll show up and have his say!
That won’t play. The people expect debates and both parties know if they won’t, they lose. Always been that way. If Hillary tries a dodge, she’s beyond toast.