Of course they should be pretty successful for Democrats. But if Dems don’t stand up for their base and instead continue to worry more about bringing back working class white people, they’re going to end up alienating huge swaths of their base, kill their momentum and make their gains as minimal as possible. Just one election cycle I’d like to see Democrats focus on their own base rather than taking them for granted and focusing on the mythical swing voters that make up a much smaller portion of the electorate than anyone pretends. Yes, Trump’s numbers are in the pits and has a lot of Republican voters wishing they had nominated and voted for someone else. But that was true before the election too. Don’t think they’ll choose a Democrat, especially Hillary, over Trump if they have to make that choice again. If you ran it back right now, yes, she’d probably win because you only have to flip a handful of razor thin states and people who stayed home would show up to vote against Trump. But the midterms won’t have that option. Dems need to get people out to deliver a fuck you to the Republican party, which they suck at. And they suck at it because they love to try and win over the unwinnable instead of working to get out their people who stay home when they don’t have real champions in the race.
Edit: And make no mistake, African Americans (2/3 of whom were women) didn’t turn out in greater numbers than the 2012 presidential election because they love Doug Jones. They did it because they hate Roy Moore and Trump. If he wants to keep those voters fired up for congressional elections in 2018, he can’t go proving the point that he’ll turn on their interests to try and placate Trump voters.