Two US networks - Fox and NBC - are projecting the Democrats will win the 23 seats they need to take over the House of Representatives.
In the US Senate, there are 51 Republicans and 49 Democrats. Both Florida and Georgia have open governor's seats, and both races feature a black Democratic critic of the president squaring off against a white, Trump-supporting Republican. Democrats will also be able to halt many items on Trump's legislative agenda, border wall funding, and a new middle-class tax cut.
"Democrats are inviting caravan after caravan, illegal immigrants to flood into our country", he said at a rally on the election's eve Monday.
In an interview with The Associated Press last month, Trump said he would not accept blame for a GOP defeat at the polls. They also alienated many intelligence professionals, a rift Schiff has vowed to fix. I don't care what the fake media says.
Since Donald Trump entered politics the Democrats have struggled to compete.
As voters in the USA head to the polls in the midterm election on Tuesday, below are several storylines to keep an eye on. "I think the public will repudiate him [Trump] by voting in a Democratic-controlled House of Representative, because they do want a check". When you participate in the political process, you can be a check on bad behavior.
GOP Whip Steve Scalise said the president's rallies were building momentum and with the economy a selling point, he predicted his party would retain a slim majority.
Trump has cast the midterm elections as a referendum on himself.
Democrats felt increasingly optimistic about their chances of taking back control of the House. Dean Heller, the only Republican seeking re-election in a state Democrat Hillary Clinton won in the 2016 presidential race. Was the New Yorker just inspired by an old soviet cartoon on United States elections?
Democrats are drawing strength from women and college-educated voters, who swung decidedly against Trump since his election. Under President Dwight Eisenhower, the S&P 500 rose 29 per cent from his election in November 1952 through November 1954. "I think there will be no difference here". He energises elements of the Republican base, who love him, and the Democrats, who hate him, at the same time.
State sen. Trudy Wade, R-Guilford, also trails in her race, but has been gaining on her challenger.
Overall, Donald Trump's approval rating among the electorate sits at 4 percent - which is almost spot-on the current RealClear Politics poll average of 43.6 percent.
Preliminary exit poll results reported by ABC News showed that 18- to 29-year-olds accounted for 13 percent of voters nationally, up from 11 percent in 2014.
Trump is trying to defy historic omens that suggest that commanders in chief often get a rebuke from voters in the midterm election of their first term. "That is particularly true when a president is unpopular, as this president is".
A voter fills out the ballot at a polling station in Madison, Wisconsin.
History was working against the president in the Senate: 2002 was the only midterm election in the past three decades when the party holding the White House gained Senate seats.
Historically, though, Republicans have been more reliable voters in midterm elections.
"The climate in our country right now, it just feels very divisive", said Caitlyn Ziegler, a 27-year-old who waited an hour to vote in Kansas City.
Anxious Republicans privately expressed confidence in their narrow Senate majority but feared the House was slipping away.
"The House has been a rubber stamp for the Trump agenda".
She added that she specifically wanted to campaign for former Rep. Ron DeSantis over Tallahassee Mayor Andrew Gillum because she is concerned that the Democratic candidate is "running as a socialist".
A Democrat-controlled House was expected to pursue anti-corruption and voter-rights legislation, and hold multiple investigations on controversial aspects of the Trump administration, not least being allegations of collusion between his 2016 campaign and Russian Federation.