The biggest day of this year’s primary campaign is approaching as 16 states vote in contests known as Super Tuesday.

The elections are a crucial moment for President Joe Biden and Donald Trump, who are the overwhelming front-runners for the Democratic and Republican presidential nominations, respectively. As the day with the most delegates up for stake, strong performances by Biden and Trump would move them much closer to becoming their party’s nominee.

The contest will unfold from Alaska and California to Virginia and Vermont. And while most of the attention will be on the presidential contest, there are other important elections on Tuesday.

Some things to watch:

So far, the Republican presidential primary has been a snoozer.

The former president has dominated the race and his last major rival in the race, his onetime U.N. Ambassador Nikki Haley, is struggling to keep up. She lost the Feb. 27 primary in Michigan by more than 40 percentage points. She even lost her home state of South Carolina, where she was twice elected governor, by more than 20 percentage points.

As the race pivots to Super Tuesday, the vast map seems tailor-made for Trump to roll up an insurmountable lead on Haley. His team has been turning up the pressure on Haley to drop out, and another big win could be a major point in their favor.

Haley’s banked a considerable amount of campaign money and says she wants to stay in the race until the Republican National Convention in July in case delegates there have second thoughts about formally nominating Trump amidst his legal woes.

Amid Trump’s commanding wins this primary season have been a notable warning sign for November: He’s performed poorly with college-educated primary voters.

In the New Hampshire and South Carolina primaries, APVoteCast found that college graduates picked Haley over Trump. Roughly two-thirds of voters in both states who went to graduate school after college voted for the former South Carolina governor.

In South Carolina, Trump won the suburbs but not by the same magnitude as his dominance in small towns and rural areas, essentially splitting the vote with Haley.

One of the biggest questions on Tuesday is whether Trump can start repairing that rupture. Weakness with college graduates and in the suburbs where they cluster is what doomed Trump in his 2020 loss to Biden.

As sleepy as the Republican presidential primary has been, the Democratic one has been even quieter. Biden has many political problems dragging him down in public opinion polls, but not, so far, at primary polling stations.

The one speed bump came in Michigan, where an organized attempt to vote “uncommitted” in the primary there to protest Biden’s support of Israel during the war in Gaza garnered 13% of the vote, a slightly higher share than that option got in the last primary under a Democratic president.

There are no similar organized anti-Biden efforts on the Super Tuesday calendar, just the president’s two longshot primary opponents who’ve yet to crack low single digits against him, U.S. Rep. Dean Phillips of Minnesota and self-help author Marianne Williamson, who revived her campaign after receiving a surprise 3% of the Michigan primary vote.

There’s far more than the presidential primaries on the ballot Tuesday.

In Los Angeles County, District Attorney George Gascon faces 11 challengers in a primary amid criticism of his progressive approach that includes not seeking cash bail for misdemeanors and nonviolent felonies and not prosecuting juveniles as adults. His opponents have blamed him for a rise in property crimes in some parts of the county, including a brazen smash-and-grab spree at luxury stores.

Gascon has weathered criticism before, including two failed recall efforts, one of which was in his first 100 days of taking office. The primary will determine who he faces in November and whether there are signs that Los Angeles’ liberal voters are changing their minds.

In San Francisco, Mayor London Breed is pushing one ballot measure to expand police powers to use tactics like drones and surveillance cameras, and another testing single adults on welfare for drugs. The two initiatives come as the city has been wracked by homelessness and drug use, and Breed faces a cranky electorate in her own reelection in November.

Associated Press