WASHINGTON (AP) – The Democrats took back the House on Tuesday, breaking the GOP’s monopoly on power in Washington that could engulf the Trump administration over the next two years.

Ending eight years of Republican control that began with the tea party revolt of 2010, Democrats picked off more than two dozen GOP-held districts in suburbs across the nation on the way to securing the 218 seats needed for a majority.

As of early Wednesday, two dozen races had yet to be decided, meaning the tally could grow slightly larger. But the final count is likely to leave Democrats with a narrow majority that could be difficult to manage and preserve.

There were signs of extraordinary turnout in several states, including Georgia, where voters waited hours in the rain to vote in some cases, and in Nevada, where the last voters cast their ballots nearly three hours after polls were scheduled to close.

The Democrats suffered stinging losses with 2020 implications in Ohio and in Florida, where Trump-backed Republican Ron DeSantis ended Democrat Andrew Gillum’s bid to become the state’s first African-American governor.

“I want to encourage you to stick to the fight,” Gillum, thought to be a rising star with national ambitions, told dejected supporters.

Yet Democrats celebrated a handful of victories in their “blue wall” Midwestern states, electing or re-electing governors in Michigan, Pennsylvania, Minnesota and in Wisconsin, where Scott Walker was defeated by state education chief Tony Evers.

With the Republicans keeping control of the Senate, the outcome in the House could mean gridlock for Trump’s agenda on Capitol Hill — or, conversely, it could open a new era of deal-making.

As the majority party, the Democrats will chair important committees and will have expansive powers to investigate the president, his business dealings and the inner workings of his administration, including whether anyone from the Trump campaign colluded with the Russians to influence the 2016 presidential election.

The road to a House majority ran through two dozen suburban districts Hillary Clinton won in 2016. Democrats flipped seats in suburban districts outside of Washington, Philadelphia, Miami, Chicago and Denver.

The results were more mixed deeper into Trump country.

In Kansas, Democrat Sharice Davids beat a GOP incumbent to become the first Native American woman elected to the House. But in Kentucky, one of the top Democratic recruits, retired Marine fighter pilot Amy McGrath, lost her bid to oust to three-term Rep. Andy Barr.

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.

Democrats’ dreams of the Senate majority, which was always unlikely, were shattered after losses in many of the top Senate battlegrounds: Indiana, Missouri, Tennessee, North Dakota and Texas.

Trump encouraged voters to view the 2018 midterms as a referendum on his leadership, pointing proudly to the surging economy at recent rallies.

The president bet big on a xenophobic closing message, warning of an immigrant “invasion” that promised to spread violent crime and drugs across the nation.

One of Trump’s most vocal defenders on immigration, Kansas Secretary of State Kris Kobach, lost his bid for governor.

Kobach had built a national profile as an advocate of tough immigration policies and strict voter photo ID laws. He served as vice chairman of Trump’s now-defunct commission on voter fraud.

The president found partial success despite his current job approval, set at 40 percent by Gallup, the lowest at this point of any first-term president in the modern era. 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.

Democrats, whose very relevance in the Trump era depended on winning at least one chamber of Congress, were laser-focused on health care as they poured hundreds of millions of dollars into surging anti-Trump energy to break up the GOP’s monopoly in Washington and state governments.

While Democratic losses were expected, particularly in the Senate, some hurt worse than others.

In Texas, Sen Ted Cruz staved off a tough challenge from Democrat Beto O’Rourke, whose record-smashing fundraising and celebrity have set off buzz he could be a credible 2020 White House contender.

Democrats’ fate in high-profile governorships in Georgia and Wisconsin were at risk as well.

In Indiana, Trump-backed businessman Mike Braun defeated Democratic incumbent Joe Donnelly. In Missouri, Josh Hawley knocked off Democratic Sen. Claire McCaskill. And in Tennessee, Congresswoman Marsha Blackburn defeated former Gov. Phil Bredesen, a top Democratic recruit.

Democratic Sens. Joe Manchin in West Virginia and Tammy Baldwin in Wisconsin won re-election. And in New Jersey, Democrats re-elected embattled Sen. Bob Menendez, who, less than a year ago, stood trial for federal corruption charges. The Justice Department dropped the charges after his trial ended in a hung jury.

Meanwhile, several 2020 presidential prospects easily won re-election, including Sens. Bernie Sanders of Vermont, Elizabeth Warren of Massachusetts, Sherrod Brown of Ohio, Sen. Kirsten Gillibrand of New York and New York Gov. Andrew Cuomo.

Tuesday’s elections also tested the strength of a Trump-era political realignment defined by evolving divisions among voters by race, gender, and especially education.

Trump’s Republican coalition is increasingly older, whiter, more male and less likely to have a college degree. Democrats relied more upon women, people of color, young people and college graduates.

Women voted considerably more in favor of their congressional Democratic candidate — with fewer than four in 10 voting for the Republican, according to VoteCast, a nationwide survey of more than 115,000 voters and about 20,000 nonvoters — conducted for The Associated Press by NORC at the University of Chicago.

In suburban areas where key House races were decided, voters skewed significantly toward Democrats by a nearly 10-point margin.

The races ushered in a series of firsts. Women had won 76 seats and were assured of nine more, a record.

The House was getting its first two Muslim women, Massachusetts elected its first black congresswoman, and Tennessee got its first female senator.

Georgia gubernatorial candidate Stacey Abrams, a Democrat, was in a fierce battle to become America’s first black female governor, though Democrats in Florida and Maryland lost their bids to become their states’ first black governors.