What you need to know

• Polls have begun closing across the United States on Election Day 2024, as the presidency and control of Congress hang in the balance.
• Presidential results have started to come in in some states, according to NBC News projections, with both Harris and Trump scoring victories.
• Residents of most states have been voting for weeks; more than 80 million votes by mail and in person were broadcast across the country.
• When do polls close in your state? Here’s a state-by-state guide.
• Polls showed the presidential race between former President Donald Trump and Vice President Kamala Harris will be neck and neck.
• It may take days or even a week for NBC News Decision Desk project a presidential winner.
• Other key races across the country will determine the balance of power in Congress.
• Ten states have placed measures on their ballots related to abortion, a key issue that experts say boosted voter turnout during early voting.