President Joe Biden and former President Donald Trump dominated Super Tuesday's primary contests from coast to coast, each winning hundreds of delegates and moving much closer to clinching their respective parties' nominations.
Biden walked away from the night with at least 1,424 delegates, slightly more than 72% of the total he needs to secure the Democratic nomination.
Trump ended the day with a minimum of 946 delegates, or 78% of the 1,215 total he requires in order to formally become the Republican party's presumptive nominee.
Yet amid their victorious romps through states like California, Maine and Arkansas, both men lost unexpected contests that highlighted potential obstacles to uniting their parties' most loyal voters behind them.
Biden lost American Samoa's Democratic caucus to political newcomer Jason Palmer, an entrepreneur who has never set foot on the South Pacific islands that make the U.S. territory. Only 91 total votes were cast in the caucus, and Palmer won 50 of them. Biden came away with 41.
Former South Carolina Gov. Nikki Haley also scored an upset victory over Trump in Vermont's Republican primary, winning 50% of the vote, while Trump secured just 45%.
Haley will drop out of the 2024 presidential race Wednesday, a source familiar with her plans confirmed to NBC News.
Haley won't announce an endorsement Wednesday, two people told NBC News. Instead, she will encourage Trump to earn the support of Republicans and independent voters who backed her, one of the sources said.
Live: NBC News Super Tuesday 2024 Primary Election Results
Below are NBC's projections for the presidential primary and caucus winners, as of 1:00 a.m. ET Wednesday.
- Alabama: Trump wins GOP contest, Biden wins Democratic race
- American Samoa: Jason Palmer wins Democratic caucus
- Arkansas:  Trump wins GOP contest, Biden wins Democratic race
- California: Trump wins GOP contest, Biden wins Democratic race
- Colorado: Trump wins GOP contest, Biden wins Democratic race
- Maine: Trump wins GOP contest, Biden wins Democratic race
- Massachusetts: Trump wins GOP contest, Biden wins Democratic race
- Minnesota: Trump wins GOP contest, Biden wins Democratic race
- North Carolina: Trump wins GOP contest, Biden wins Democratic race
- Oklahoma: Trump wins GOP contest, Biden wins Democratic race
- Tennessee: Trump wins GOP contest, Biden wins Democratic race
- Texas: Trump wins GOP contest, Biden wins Democratic race
- Vermont:Â Haley wins GOP contest, Biden wins Democratic primary
- Virginia: Trump wins GOP contest, Biden wins Democratic race
- Utah: Biden wins Democratic primary
In addition to the presidential race, several down ballot contests Tuesday were closely watched.
None more so than California's Senate primary, where Democratic Rep. Adam Schiff and Republican Steve Garvey won the top two spots in a race to fill the seat vacated by the late Sen. Dianne Feinstein.
California is a deep blue state, so Tuesday's results were especially promising for Schiff. In November, the Trump antagonist will be the only Democrat on the ballot in a state that has not elected a Republican to the U.S. Senate since the 1960's.