What to know

• Polls have begun to close in the United States on Election Day 2024 as the presidency and control of Congress hang in the balance.
• Presidential results have begun to come in for some states, according to NBC News projections, with both Harris and Trump picking up victories.
• Residents in most states have been voting for weeks; more than 80 million mail-in and early in-person ballots were cast all over the country.
• When do polls close in your state? Here is a guide for each state.
• Polls have shown the presidential race between former President Donald Trump and Vice President Kamala Harris to be ripe.
• It can take days or even a week for NBC News Decisions Bureau to project a presidential winner.
• Other key races across the country will determine the balance of power in Congress.
• Ten states have abortion-related measures on the ballot, a key issue experts say drove early voting.