Okay, maybe I'm biased because it was my assignment to report out some of the downballot races tonight, but when the presidential primaries are basically all over but the cryin', they make for much more interesting politics. But once Biden and Trump make it official, don't let the intensity of the presidential race overshadow these races further down the ballot. There's a lot at stake — majority powers in two narrowly divided chambers! — and these races can sometimes tell us more about what voters think is important than the marquee race at the top of the ticket. Of course, you can always depend on 538 to keep you up to speed!

—Kaleigh Rogers, 538

With the exception of a remarkable outcome in American Samoa, this was a night without very many surprises. Trump and Biden continue to dominate their respective parties, even as doubts linger — about age, about policy and about electability, to name a few concerns. But Trump's main opponent, Haley, has just won her second primary of the season — Vermont. Biden has opposition on the left, but no challenger; from the center of his party, he has a challenger, but no clear opposition.

One lesson from all of this is that even for candidates with as many liabilities as these have, it is incredibly difficult to compete with the name recognition and influence of a sitting or former president. In theory, parties could opt to nominate someone other than the sitting president — in practice, they have not really done so since the mid-19th century. Parties have come to be defined by their presidents. We especially see this with Trump, but this primary season and Super Tuesday have highlighted just how much it's true of Biden, too.

And yet it shows the cracks in the presidential dominance of their parties as well. Even as Trump has largely taken over the GOP, there remains a consistent, if small, segment that would like to see the party move in a different direction. And even as Biden continues to (almost) sweep the primaries, activists are organizing to use the primaries to protest some of his policies. Still, it's telling that ultimately these intraparty disagreements aren't framed as fights between factions, but rather in terms of support or opposition to the presidential figure at the head of the party.

—Julia Azari, 538 contributor

We're not ending the live blog just yet since there are more results to come ... But we're going to get some shuteye and be back here tomorrow, bringing you updates from some of today's later-closing races.

So, it's "final" thoughts time — what did everyone take away from tonight's results?

—Tia Yang, 538

Interesting, Geoffrey. I was expecting Carl to win that one, as he had the geographic advantage: Carl and Moore were thrown together into this new district in redistricting, and Carl represented 59 percent of residents in the new district. But perhaps Moore’s conservative bona fides carried the day: He is a member of the House Freedom Caucus, so this primary was a victory for the insurgent wing of the Republican Party.

—Nathaniel Rakich, 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