The party that will control the US House of Representatives – one of the two chambers that make up the US Congress – remains up in the air.

The House currently has a Republican majority, which Democrats hope to flip with a number of key races.

Every seat in the House of Representatives is at stake this election cycle. It is important to note that the final count may not be known for several days.

Republicans won several races on Tuesday, giving them control of the Senate.

Here are some of the races that could determine control of the U.S. House of Representatives:

Sarah McBride made history by becoming the first transgender member of the U.S. House of Representatives after winning her Delaware district on Tuesday night.

McBride, who already broke history as the first openly transgender person ever elected to a Senate seat, ran against Republican John Whalen, a former Delaware state police officer.

She defeated Whalen in Delaware’s at-large congressional district — which includes all of Delaware — by 15 points.

“Delaware has sent the message loud and clear that we must be a country that protects reproductive freedom, that guarantees paid leave and affordable child care for all our families, that ensures housing and health care are available to all and that this is a democracy . that’s big enough for all of us,” she wrote after the win over X.

In Virginia’s Second District, which includes Virginia Beach, Democrat Missy Cotter Smassal challenged incumbent Rep. Jen Kiggans, a Republican.

Votes are still being counted in the race between the two Navy veterans, but Kiggans led by four points as of early Wednesday morning. It marks one of the most competitive races in the state.

Also in Virginia, two candidates want to fill Democrat Abigail Spanberger’s seat after she decided not to run for re-election but to run for governor.

Republican candidate Derrick Anderson and Democrat Eugene Vindman are vying to represent Virginia’s 7th District, which includes Fredericksburg and Culpeper in the northern part of the state.

The district flipped from red to blue — by slim margins — in 2018, when Spanberger won for the first time.

As of early Wednesday morning, the race had not yet been called.

Pennsylvania’s 10th Congressional District, in the south-central part of the state, is seeing a showdown between six-term incumbent Scott Perry and Democratic challenger Janelle Stelson.

Perry, a former chairman of the ultraconservative House Freedom Caucus, has yet to face a strong challenger. He helped lead the Trump campaign’s efforts to overturn the 2020 election results.

Stelson is a former TV news anchor and former Republican who registered as a Democrat last year.

On Wednesday morning, Perry led by less than one point, BBC’s American news partner CBS reported. But the race has not yet been officially declared.

In Pennsylvania’s 8th District, Republicans flipped one seat in the district that includes President Joe Biden’s hometown of Scranton.

Business owner Robert Bresnahan defeated incumbent Democratic Rep. Matt Cartwright by two points. Cartwright served six terms.

Republicans flipped four seats in the 2022 midterm elections, paving the way for them to capture the House of Representatives.

Now the Democrats want to win them back.

There are several important House races to watch in New York.

In the 17th Congressional District, former Democratic Congressman Mondaire Jones is challenging Republican Rep. Mike Lawler, a freshman lawmaker.

Democrats lost the district, seen as one of the most contentious swing districts in the US, in 2022. It had not yet been officially declared as of Wednesday morning.

Also in New York, freshman Republican lawmaker Marc Molinaro is running for reelection in the race against Democrat Josh Riley, a former county executive.

The rematch race between the two candidates in New York’s 19th Congressional District is seen as one of the most expensive House races in the country. Molinaro won in 2022 by just 4,500 votes.

The race had yet to take place on Wednesday morning, but the two candidates were neck and neck with 94 percent of the votes counted.