Republicans will maintain control of the House of Representatives by the thinnest of margins, NBC News projected Wednesday, handing President-elect Donald Trump and his party all the levers of power in Washington.

A Republican-controlled Congress will allow Trump to quickly fill out his Cabinet and other top administration roles and advance his agenda for at least the next two years. Last week, Republicans flipped three Democratic Senate seats to win control of the upper chamber.

NBC News lays out how Republicans won...

Democrats had believed they were in a good position to win back the majority they lost just two years ago. They needed a net gain of only four seats to flip control of the House given that Republicans now hold 220 seats to the Democrats’ 212 — one of the smallest majorities in modern history.

But the two parties basically have fought to a draw in the House, preserving a status quo that favored Republicans.

In New York, Democrats were able to knock off a trio of vulnerable freshman GOP incumbents: Rep. Brandon Williams in the Syracuse region, Rep. Anthony D’Esposito on Long Island, and Rep. Marc Molinaro, whose district includes parts of the Hudson Valley and the Catskills. They were among the 18 GOP House districts that President Joe Biden carried in 2020.

Democratic challenger George Whitesides also ousted vulnerable GOP Rep. Mike Garcia in Southern California.

But Trump’s triumph - including wins in battlegrounds like Pennsylvania and Michigan where there were key House races - helped buoy GOP incumbents and new candidates in the places that mattered.

Two of the biggest GOP prizes came in the Keystone State.

Republicans unseated two vulnerable, veteran Democrats in neighboring districts in eastern Pennsylvania. GOP businessman Rob Bresnahan ousted six-term Rep. Matt Cartwright, a former member of leadership, in the 8th District, which Trump carried in 2020. In the neighboring 7th District based in Allentown, GOP state Rep. Ryan Mackenzie upset Democratic Rep. Susan Wild, the top Democrat on the House Ethics Committee.

Meanwhile, In the capital of Harrisburg, Democrats believed they had a good chance to knock off former Freedom Caucus Chairman Scott Perry, a Trump ally who played a role in the effort to overturn the 2020 election. But the six-term incumbent beat back a strong challenge from former local TV anchor Janelle Stelson, who attacked Perry on everything from the Jan. 6 Capitol attack and abortion rights to his votes on veterans issues.

Republicans also captured a Michigan seat that had been held by Democratic Rep. Elissa Slotkin, who successfully ran for an open Senate seat.

And GOP challenger Gabe Evans narrowly defeated freshman Rep. Yadira Caraveo, D-Colo., by less than 1 percentage point in a heavily Hispanic district north of Denver.

There are still six uncalled races:

"It is a beautiful morning in Washington. It is a new day in America," a celebratory Speaker Mike Johnson, R-La., said on the steps of the Capitol, flanked by his leadership team, as the House returned to Washington on Tuesday.

"The sun is shining, and that is a reflection about how we all feel."

So Trump takes the trifecta: A Popular (and Electoral) Vote victory for The White House, taking back the Senate, and holding The House.