My own impressions are more modest. Alabama Republicans spared their party the shame of electing this creep to Congress. In backing Moore, Steve Bannon made a very reasonable bet–most of us expected Moore to win even after the revelations–but he lost this one.
Everything else is over-reading the data. Are Dems more energized than a normal out-of-power party? I think that’s unproven. Jones may turn out to be their Scott Brown. Have Dems solved the issue of turning out black voters in the post-Obama era? Or was it that the Republican nominee was the sort of man who rhetorically denigrated the Constitutional Amendments that ended slavery? Will 2018 be a Democratic tsunami? I don’t know yet. I also think it would be a mistake for anyone to take Jones’ performance in Alabama today as any indicator of how Trump will perform in 2020.