Remember how Elizabeth warren went all Pocohontus Pit Bull for Hillary? Imagine that being her stick for the next 2 years and then running for president.

Remember John Kerry getting up at the DNC in 2008 and roasting the fuck out of the GOP and everyone screaming "where was that John Kerry when he was running for President?"

I think that's what the OP is asking. I don't think he is asking for an exact replica of Trump with a D next to his name spouting racist shit. More like someone who will call Trump voters deplorable and never apologize for it. Make that shit stick and double down when interviewed about how divisive it is.