"With Democrats' leadership in the state solidified, NY can pass policies previously blocked by Republicans to expand health care coverage, address climate change, and ensure women retain the right to make their own medical decisions", Jessica Post, executive director for the Democratic Legislative Campaign Committee, said in a statement on Tuesday.
A simple House majority would be enough to impeach Trump if evidence surfaces that he obstructed justice or that his 2016 campaign colluded with Russian Federation.
President Trump called Pelosi Tuesday night to offer congratulations, her office said. Moscow denies meddling and Trump denies any collusion.
Democratic leader of the House Nancy Pelosi hailed the expected Democrat wins, saying Americans have "had enough of division". The president, in an earlier tweet, weighed in on the midterm results, overlooking the Democratic pickups in the House and writing: "Tremendous success tonight".
Democratic gains included several suburban districts eyed for turnover because they were won by Hillary Clinton, including seats outside Washington, Philadelphia, Miami and Denver.
"Grassroots enthusiasm for President Trump, who did more than any President in history to support Republican candidates, and the Republican Party's expansive get-out-the-vote operation, turned the forecasted Democrat tsunami into a ripple", McDaniel said.
All 435 seats in the House, 35 seats in the 100-member Senate and 36 of the 50 state governorships were up for grabs. Both Barack Obama's and Bill Clinton's numbers were 5 points higher, and both suffered major midterm losses of 63 and 54 House seats respectively.
Mr Trump spent the final weeks of the campaign telling supporters that Democratic victories would threaten their safety and stability.
The president's impact played out differently in the roughly 80 competitive House races and more than a dozen close Senate contests. They also suffered a setback in Florida, where Democrat Andrew Gillum conceded in his bid to become the state's first African-American governor.More news: Breaking Bad Movie to Reportedly Follow Jesse, Aaron Paul to Return
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In south Florida, former Health and Human Services Secretary Donna Shalala defeated Republican Maria Elvira Salazar.
Such a Democratic caucus will test the power and influence of leaders like Pelosi, who plans to seek another term as speaker of the House. In Kansas, Republican Kris Kobach, a Trump ally who was a leader of the president's disbanded voter fraud commission, fell to Democratic state senator Laura Kelly.
With Democrats now poised to take control of the House, Mr. Cummings will likely be in a position as chairman to issue those subpoenas on his own.
Allan, the Indianapolis truck driver, said he likes how Trump is leading the country, particularly when it comes to immigration and foreign policy. "They can now open investigations into the president, and we'll finally find out if Donald Trump has ever done anything unethical". Perhaps more important, they would claim subpoena power to investigate Trump's personal and professional shortcomings. They believed that Clinton's showing meant that some Republican voters, tired of GOP control of Washington and Austin, might defect.
Investors often favor Washington gridlock because it preserves the status quo and reduces uncertainty, even though many investors this time around had been hoping for a continuation of the Republican agenda.
The nationwide survey indicated that almost two-thirds said Trump was a reason for their vote.
But a US Department of Homeland Security official said the reports of voting technology failures appeared so far to have had no significant impact in preventing people from voting.
This year's primaries, however, gave state Republicans a serious jolt, prompting the party to invested more heavily in data to better target voters, said Kevin Carns, executive directof of the House Republican Organizing Committee. "I think his rhetoric is one in which he's putting himself more front and center rather than perhaps the policies or party agenda", says Jacob Neiheisel, associate professor of political science at University at Buffalo. In the last such congressional elections in 2014, there were 27.5 million early votes.
GOP House leadership elections are on track to take place the week after the midterm elections.