Election Day has now carried over into Wednesday morning with no clear winner emerging yet in a tight contest.
With polls now closed, President Donald Trump is projected to win Ohio, Florida and Texas, while former Vice President Joe Biden is ahead in Arizona, Nevada and Wisconsin. The races in Georgia and North Carolina are too close to call as Trump holds slight leads.
Attention is now turning to the industrial Midwest, but final results may not come for Michigan and Wisconsin until later Wednesday morning. Pennsylvania may not be called until later in the week.
Biden, in an address to supporters in Delaware, urged patience as votes are counted and expressed confidence that he would ultimately prevail.
As of 4:46 a.m. ET, Biden has picked up 224 electoral votes vs. 213 for Trump, according to NBC News projections.
Despite Biden's narrow lead, Trump tried to claim victory in an address to supporters, but millions of legally cast ballots are still being counted. NBC News has not made a call in the race.
Republicans and Democrats are also battling for control of the Senate. Democrats flipped a seat in Colorado with John Hickenlooper's victory over GOP Sen. Cory Gardner, while Republicans picked up a seat in Alabama with former college football coach Tommy Tuberville's defeat of Democratic Sen. Doug Jones.
The House of Representatives is projected by NBC News to remain under Democratic control.
Here's what you need to know so far: