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The midterm election results will not be clear on Election Day and final results won't arrive for "a few days," White House press secretary Karine Jean-Pierre said Monday.

Jean-Pierre made the statement during a press conference at the White House on the eve of Election Day. She argued that many states use mail-in ballots and other forms of early voting that often won't be counted until after the ballots cast in-person on Tuesday.

"We may not know all the winners of elections for a few days. It takes time to count all legitimate ballots in a legal and orderly manner. That's how this is supposed to work," Jean-Pierre told reporters.

"You heard the president say this last night," she added.

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White House press secretary Karine Jean-Pierre answers questions during a briefing

White House press secretary Karine Jean-Pierre speaks with reporters in the James Brady Press Briefing Room, Sept. 16, 2022. (AP Photo/Alex Brandon)

Joe Biden speaks DNC rally

President Joe Biden speaks during a rally hosted by the Democratic National Committee at Richard Montgomery High School on Aug. 25, 2022, in Rockville, Maryland. (Drew Angerer/Getty Images)

She also said that President Joe Biden expects to address the country regarding the election results on Wednesday.

Republicans are widely expected to take control of at least the House of Representatives, though control over the Senate remains a toss-up.

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House Minority Leader Kevin McCarthy, R-Calif., is confident Republicans will take back the House on Tuesday after four years of Democratic control. Polls agree with his assessment, though the size of Republicans' likely majority remains cause for debate.

"The one thing you always have to remember is majorities are not given – they’re earned," McCarthy told Fox News Digital last week. "We never take anything for granted, but I feel good because of the quality of the candidates we have running from Rhode Island to New Hampshire to Connecticut to Oregon to Washington to Arizona to California."

"There is no place we can’t compete and that’s what is exciting," he added.

House Minority Leader Kevin McCarthy talks in Pennsylvania

House Minority Leader Kevin McCarthy speaks about Republicans' "Commitment to America" agenda at DMI Companies in Monongahela, Pennsylvania, Sept. 23, 2022. (AP Photo/Barry Reeger)

McCarthy, who is first in line to become House speaker should his party take the chamber, has vowed to use a Republican majority to repeal plans to add 87,000 new agents to the IRS, as well as open investigations into Biden's administration.

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McCarthy and Republicans have focused heavily on the economy, inflation, crime and Biden's personal unpopularity to secure polling advantages across the country.