This is all ridiculous because Hillary's victory, while massive, isn't going to in any way be an endorsement for Hillary: it's going to be a resounding defeat for Trump. (Unlike, say, 2008, which was an endorsement for Obama). As such, Hillary's coattails are not going to be particularly significant, which means it's unlikely Democrats take the Senate.
There's a good chance a lot of Republicans will stay home and not vote at all, which would provide potential coattails for other Dems. I won't do that; I will write in Kasich.