Speaker of the House Nancy Pelosi (D-CA) speaks during a bill enrollment ceremony at the U.S. Capitol January 9, 2020 in Washington, DC.Win McNamee | Getty ImagesDemocrats will keep their House majority, NBC News projected Tuesday, as the major U.S. parties jockeyed for control of the White House and Senate.Democrats entered the 2020 election heavily favored to keep control of the chamber. The biggest question was whether they could expand their advantage.Democrats have a 232-197 majority in the current Congress. One representative is a Libertarian, while the House has five vacancies.Competitive House races across the country, led by multiple contests in Texas and New York, were expected to determine whether Republicans could cut into Democrats’ edge. Democrats flipped House control in the 2018 midterms by gaining a net 40 seats.Keeping House control will ensure Democrats can push policy priorities through if Joe Biden wins the White House and the party flips Senate control. If Democrats fail to win the White House or Senate, the House majority provides a buffer for them against Republican goals.House Speaker Nancy Pelosi, D-Calif., is expected to run to extend her second stint as leader of the House.This story is developing. Please check back for updates.Subscribe to CNBC on YouTube.