Control of the House gives Democrats the ability to launch investigations into the president and stifle his agenda.
"I think everyone was bracing for any possible, insane scenario to show itself tonight but it basically looks like the baseline consensus forecast was correct", said Michael Purves, head of equity derivatives strategy at Weeden & Co, New York.
Democratic control of the House would break the GOP's monopoly on power in Washington and would nearly certainly lead to an onslaught of investigations of Trump's businesses and his administration. More women than ever were running, along with military veterans and minorities, many of them motivated by Trump's rise. In fact, he may find it more politically effective to have House Democrats as a foil.
In other notable contests, Democrat Alexandria Ocasio-Cortez won her race for a House seat in NY - becoming, at 29, the youngest woman ever elected to Congress.
US voters cast ballots on Tuesday to fill all 435 seats in the US House Representatives and approximately one-third of the 100-member US Senate in addition to other local and state offices.
Democrats needed to pick up two dozen seats to seize the House majority and two seats to control the Senate.
Pollsters, gun shy after getting their 2016 predictions wrong, urged caution.
House Speaker Nancy Pelosi hopes to become speaker again, though many Democratic candidates, particularly in states Trump won, said they would not support her.
"Tremendous success tonight", Trump said.
Americans disapprove of President Donald Trump's job as President, according to preliminary CNN exit polls.
Voters often sit out the midterms.
Apple Releases New Products at Development Event in Brooklyn
Apple is offering their flagship tablet in new 11 and 12.9 inch forms alongside the 10.5 inch carrying over from previous year . Apple said during the iPad Pro announcement that there was a number of magnets in the new tablets - over 100 of them, in fact.
Supreme Court rejects net neutrality appeal but FCC ruling stands
And the Justice Department acknowledged in Monday's request that the appeals court ruling is likely to come first. That is the lead case that the Administration appealed to the Justices on Monday.
Florida Gives Voting Rights To Former Felons
Fifty-seven-year-old Zinovy Nudel said he would have supported rights restoration years ago, but it wasn't on the ballot. The amendment had largely been polling above the required 60 percent needed to be added to the state constitution.
The thin red, white and blue line: People queue up to vote in the U.S. midterm elections at Grady High School in Atlanta, Georgia, yesterday.
And on the streets there was a palpable buzz all day.
Long lines and malfunctioning machines marred the first hours of voting in some precincts, including in Georgia, where some voters reported waiting up to three hours to vote in a hotly contested gubernatorial election.
IN voters have a positive view of the nation's economic outlook - seven in 10 said the nation's economy is good while about 3 in 10 said it isn't.
Voters between the ages of 18 and 34 backed Democrats by 62 percent to 34 percent, up from 2014 when 54 percent backed Democrats and 36 percent supported Republicans. "Now it's like the hottest thing". But White House spokeswoman Sarah Huckabee Sanders minimized the magnitude of Democratic gains.
The president so dominates politics across the country that despite not being on any ballot he has made the election largely about him.
Cook said Democrats have a possibility of gaining as few as 20 seats and as many as 45 seats.
"I have and he's happy", Sanders insisted. "And no matter what the outcome, whether you're a Republican or a Democrat, I think we can all agree that the big loser this year is all of our Thanksgiving dinners". AP VoteCast also showed a majority of voters considered Trump a factor in their votes.
Trump has sent soldiers to the Mexican border, threatened to have illegal immigrants shot if they throw stones, and vowed to restrict citizenship rights.
In Texas, Republican Ted Cruz Cruz was projected to beat his challenger, Democratic rising star Beto O'Rourke.
The result in Texas will say much about which way argument has worked best in these polarized times.
In the House, Democrats picked up seats across the map, ousting incumbent Republican Barbara Comstock in suburban Virginia and sending Donna Shalala, a former Cabinet secretary under President Bill Clinton, to the House in south Florida.