Haley is now speaking live from Charleston, South Carolina, and she just announced she is suspending her campaign. There are now no major Republican candidates left running against Trump.

—Nathaniel Rakich, 538

While you were sleeping, ABC News projected Trump as the winner in the last two presidential contests: Alaska and Utah. Trump currently leads in Alaska 88 percent to 12 percent and in Utah 57 percent to 42 percent.

—Nathaniel Rakich, 538

After a full-ish night's sleep, we're back on the live blog as the winners of several House primaries from Super Tuesday remain unknown. However, the big news this morning is that campaign sources are telling ABC News that Haley will suspend her campaign for president after winning just one primary yesterday, making Trump the presumptive Republican nominee. She will deliver remarks at 10 a.m. Eastern, and we'll cover it live right here.

—Nathaniel Rakich, 538

It's just past 2 a.m., and we've got major results in from most of Super Tuesday's wide-ranging slate of primary contests. So far, Trump has won at least 12 of the 15 states holding GOP presidential nominating contests, while Haley has won Vermont — though whether she hits a 50 percent (plus one vote) threshold of victory there will determine the exact number of delegates she takes home.

Either way, with an estimated 943 total delegates to Haley's 86 so far, per ABC News projections, Trump's well on his way to securing the magic delegate majority number of 1,215 — though it will take at least another week. He's so far secured 667 delegates tonight and is likely to hit the 769 mark that Elliott noted earlier would set him up to mathematically clinch the nomination on March 12. Of course, we're all watching to see if Haley drops out sooner.

In other highlights:

- As expected, Republican Lt. Gov. Mark Robinson and Democratic state Attorney General Josh Stein secured their parties' respective nominations, and will go head to head in what's expected to be a close general election contest for governor.

- Rep. Colin Allred locked up the Democratic nomination in Texas's Senate race, and will face off against Sen. Ted Cruz in the general.

- Democratic Rep. Adam Schiff secured not only the top spot in a top-two primary, but also a likely glide path to the nomination, as the second spot on November's ballot went to Republican Steve Garvey instead of a second Democrat.

We're still tracking a dozen-odd downballot races that have yet to be projected, and awaiting presidential primary results in Utah and Alaska, so we'll see you back here tomorrow ... er, later today, with more results and analysis!

—Tia Yang, 538

Court-ordered redistricting seismically impacted the congressional map in Alabama, precipitating high-stakes primaries in the new 1st and 2nd Districts.

Under the new lines, the Democratic-leaning 2nd District runs from Mobile across much of Alabama's Black Belt. Overall, 11 Democratic hopefuls are on the ballot, but State Rep. Napoleon Bracy, state House Minority Leader Anthony Daniels and former Justice Department official Shomari Figures may be best-positioned to advance to a likely April 16 runoff. Through mid-February, Figures had raised about $299,000, second only to Daniels's $323,000. But Protect Progress, a pro-cryptocurrency super PAC backing Figures, has shelled out $1.7 million to support him, according to data from OpenSecrets. By comparison, Bracy had only raised around $106,000. Still, Bracy may have geography working for him: His home base of Mobile County constitutes 36 percent of the district's population, more than any other county.

The new map also placed two second-term GOP incumbents into a head-to-head primary for the new, dark red 1st District: Rep. Jerry Carl, who currently represents about 59 percent of the new seat's population, and Rep. Barry Moore, who represents the other 41 percent. In such a deeply Republican seat, both contenders have tried to position themselves as the truest pro-Trump conservative. Carl has had the upper hand monetarily. Across his campaign and victory committees, Carl has brought in more than $2 million, compared with Moore's $688,000. And Carl is also getting somewhat more outside support, with groups spending $1.5 million to oppose Moore and just $1.1 million to support Moore or oppose Carl. A late February survey from Auburn University at Montgomery found Carl ahead 43 percent to 35 percent, perhaps in line with Carl's slight geographic and monetary advantages.

—Geoffrey Skelley, 538