Super Tuesday primaries 2024: Trump and Biden dominate, Haley drops out

538 tracked how Trump and Haley did, plus key U.S. House and Senate races.

March 5 was Super Tuesday — the biggest election day of the year until the one in November! With former President Donald Trump projected to win 14 of the day's 15 GOP presidential nominating contests, former U.N. Ambassador Nikki Haley announced Wednesday morning that she is suspending her campaign.

It was also the first downballot primary day of 2024, with important contests for Senate, House and governor in states like Alabama, California, North Carolina and Texas.

538 reporters, analysts and contributors broke down the election results as they came in with live updates, analysis and commentary. Read our full live blog below.


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More 2024 weirdness: The post-14th Amendment primary

Yesterday, the Supreme Court rejected the legal arguments claiming that Trump could be disqualified from running for president in 2024 because of his connection to the Jan. 6 insurrection at the U.S. Capitol. Section 3 of the 14th Amendment states that anyone who held a public or constitutional office and has engaged in insurrection is ineligible to hold office in the future, unless Congress passes a law stating otherwise. Section 5 says that Congress can also pass laws to enforce any of the provisions in the amendment. Lawsuits in several states came forward to disqualify Trump on these grounds.

But until recently, very few people had given much thought to this part of the 14th amendment since the years immediately following the Civil War. Legal scholars brought up a couple of ambiguities — did it apply to the presidency, since a number of offices are named, but not the president? Do we have an agreed upon definition of what counts as participating in an insurrection and whether Trump did that in 2021? (Spoiler alert: No.)

The Supreme Court ruled unanimously that the state of Colorado could not disqualify Trump, though there were disagreements about how far to take that ruling. A majority held that Congress would need to pass a law in order to enforce Section 3. Though the unanimity of the ruling papered over some of the partisan politics, the timing was impossible to separate from political considerations, since it came just in time for today’s big round of contests.

—Julia Azari, 538 contributor


North Carolina’s state House speaker is probably going to Congress

ABC News can project that Tim Moore has won the GOP primary for North Carolina’s 14th District. Moore is the speaker of the state House and played a role in redrawing North Carolina’s congressional map this cycle to give Republicans three new safe seats — including one that included Moore’s home base. Unsurprisingly, he jumped into the race and faced only nominal opposition in the primary, and he should easily win the general election as well in this Trump +16 district.

—Nathaniel Rakich, 538


Some updates from North Carolina

Some of those races to watch in North Carolina are still cooking, and I have a hunch we may end up in runoff territory for a couple. In the 1st District's GOP primary, Laurie Buckhout is edging ahead of Sandy Smith by 4 percentage points, with 34 percent of the votes in.

In the 6th District Republican primary, it's an incredibly close three-way tie right now between Trump-endorsed political newbie Addison McDowell, former Green Beret Christian Castelli, and former Rep. Mark Walker, who represented the district from 2015-2021 before making an unsuccessful bid for the Senate. Bo Hines, a former wide receiver for North Carolina State University who ran unsuccessfully in 2022, is trailing the other three. This race will determine the winner in November — there are no Democrats bothering to run in the 6th, since it was redrawn to be much redder.

And in the deep-red 8th District outside Charlotte, redemption-seeking former nominee Mark Harris, whose 2018 congressional win was thrown out due to allegations of ballot fraud, is just barely leading Allan Baucom, a farmer and former chairman of the Union County Board of Commissioners. State Rep. John Bradford, who has poured $1.3 million of his own money into his campaign, is trailing with 81 percent of votes in.

Remember that in North Carolina, if no candidate gets 30 percent or more of the vote today, races will go to a two-candidate runoff in May.

—Kaleigh Rogers, 538


Speaking of Trump endorsements …

The former president's scorecard for endorsees is looking pretty good at the moment. Out of six candidates whom Trump endorsed, three have won their primaries (Mark Robinson for North Carolina Governor, Mayra Flores for Texas's 34th District and Tim Moore in North Carolina's 14th District) and two are leading (McDowell, who I just mentioned, and Brandon Gill in Texas's 26th District). We'll have to wait for the polls to close in California to see if Trump is heading for a perfect score.

Kaleigh Rogers, 538


Trump claimed the GOP nomination pretty fast historically

Back in late January, we wondered if the 2024 Republican presidential primary might be the shortest in modern history. But because Haley continued to contest the race until Super Tuesday, the competitive period of this year's GOP contest ended up falling short of setting any records. Still, it was undoubtedly on the quick side, historically.

The 2024 Republican race lasted 52 days from Iowa through today, during which time all states and the District of Columbia held 25 contests. The March 6 effective end date puts it just behind the record earliest end of a nomination season (March 3 in the 2004 Democratic contest) and the number of state-level elections (19 in the 2000 Democratic race). Nonetheless, going back to the 1976 election cycle, this year's Republican campaign was much shorter than the median number of competitive days (85 days), state-level contests (39) and end date (April 9).

To be clear, measuring the effective end date of a nomination race's competitive period is not always cut and dry, although it was this time around. We based our approach on political scientist Caitlin Jewitt's work on presidential primary competition, which classified a candidate as their party's presumptive nominee either when all viable opponents have dropped out or when they clinch a delegate majority from the results of primaries and caucuses. In Trump's case, Haley was his last viable opponent.

—Geoffrey Skelley, 538