The Democrats netted five House seats, they didn't lose any seats in the Senate, they netted out even among the governors. It still has a majority of the U.S. House of Representatives, for the third time in a row. At the state level, the Republicans still have a big majority of the governorships. The President is still a Democrat, but he wasn't on the ballot.
Pundits are in trouble, and pollsters are in bigger trouble.
Of all the many battalions of talking heads, working mostly off of polling data, about 0.1 percent said the Democrats would pick up seats in the House. The polling industry is in a ditch. The telephone response rate to pollsters is way down. It's not much better with exit polls. They do not include a sample of voters casting absentee ballots, whose numbers have grown enormously since the passage of Motor Voter legislation and now include about 2 million voters in California.