I mean, there are probably some who think that next time, they just need to nominate someone who most don't see as a criminal.
But I think the nature of the win will be more of a wake-up call than usual. The most obvious thing is to look at Bernie's movement & a lot of the anti-establishment message that he shared w/ Trump, and build off of that. They won't try to appeal to other elements of the winning coalition, but I can see them breaking w/ the past and trying to forge a real progressive platform with (hopefully) a bit more pragmatism than Bernie espoused. Without doubt, the party will change.
They'll make big gains in the house in 2018 regardless; that's just how it goes. The Senate will take a long time now. Yesterday was the best shot they'll have for awhile.
If Trump gets 2 terms, I'll be shocked. But I was shocked when he won the primary, and when he won yesterday.