The ONLY reason she's being floated around by establishment types is because of her gender and ethnicity, it has nothing to do with if she can actually win and do a good job. The line of attack against anyone who doesn't want her will be that they are racist or sexist and that's going to turn off middle of the road voters and we need them to win. Let her build her own reputation first and see if she can bring people in, that ICE is like the KKK (perception) question will haunt her for years and it was almost as stupid as Hillary bragging about putting coal miners out of work.
I don't think that is a thing that exists. It doesn't even make sense. Anyone that would have used that as an excuse to vote for Trump was always voting for Trump.
And the ICE thing is barely a story now. Nobody is going to care in 2 years. Whoever the nominee ends up being will probably have way bigger issues they will have to deal with. Including her.
Trump's in his 70's so the other side really can't use age against him.
That doesn't matter. Republicans just show up no matter what. People will need to be excited about the Dem nominee. Whether that will really prevent that excitement I can't say but an 80 year President isn't really ideal.