the most important election in a generation
Baloney. 2016 might have been, 2018 certainly is not. The only thing liable to happen is that Dems flip the house. Even that is uncertain.
Polls are not showing terrific leads by Democrats, most every race is a toss up. All indications are that there will not be blue wave of any magnitude. Win or lose, after the election things will pretty much go on just as they are now. And in 2020 the same claim will be made about the generational
importance of that election.
It'll be interesting to see whether truly horrible government will get out the voters though.