He needs to deny & then immediately turn it back on Trump, as in:
“Yeah, I'm saying it didn't happen. I'm not that kind of guy. Tell you who is that kind of guy, though, and it's Donald J. Trump. Why don't you go ask him the same question, after all, he's the one who brags about grabbing women in their private regions...I'm not even going to use his language; it's too disgusting."