Voters in six states are heading to the polls Tuesday to cast their votes in a slew of races up and down the ballot.

Arizona, Illinois, Kansas, and Ohio will be casting their votes in both the Democratic and Republican presidential primaries, while Florida will only be holding a GOP primary after the Democratic one was canceled. President Joe Biden and former President Donald Trump surpassed the delegate thresholds to become their parties’ presumptive nominees on March 12, and are not expected to be blocked from victory in any of Tuesday’s primary contests.

However, all eyes will be watching whether or not the “uncommitted” vote push continues to plague Biden on Tuesday night as the president continues to face criticism for his handling of the Israel-Hamas war. In Kansas, voters will have the option to vote for “none of the names shown” in both the Democratic and Republican primaries.

And in Arizona, a campaign has been launched to vote for author Marianne Williamson instead of Biden as no uncommitted or write-in option will appear on the ballot.

Meanwhile, Trump’s biggest unknown of the night may lie in whether or not former U.S. Ambassador to the United Nations Nikki Haley, who dropped out of the GOP primary the day after Super Tuesday, wins a sizable portion of votes in any of the states she is appearing on the ballot after she secured over 77,000 votes in Georgia on March 12 — largely from the Peach State’s suburbs.

Still, the most excitement of the night will come from races down the ballot, as several Senate and House primary races take place that will shape the playing field come November as both parties try to wrestle control of both chambers. California’s special election to replace former House Speaker Kevin McCarthy will also be one to watch, as Republican Assemblyman Vince Fong seeks to fill McCarthy’s seat for the remainder of his term.

Races to watch

Florida

Trump is largely expected to win Florida’s Republican primary in a landslide as all of his challengers for the Republican nomination have dropped out of the race. Gov. Ron DeSantis (R-FL), once thought to be Trump’s biggest threat to securing the GOP nomination for a third time, dropped his bid for the nomination back in January. 

Still, DeSantis, along with Haley, former New Jersey Gov. Chris Christie, former Arkansas Gov. Asa Hutchinson, entrepreneur Vivek Ramaswamy, and Ryan Binkley, will appear on the ballot. Voters in Florida must register by party to participate in a party’s primary.  

Florida’s Democratic primary was canceled as Biden was the only candidate nominated, awarding all 224 of the party’s delegates to Biden. 

Delegates at stake: 125 for Republicans

Most polls close at 7 p.m. EDT, with the rest closing at 8 p.m.

Ohio

What to watch: Ohio’s Senate race is considered to be one of the most competitive contests as Sen. Sherrod Brown (D-OH) seeks to win another term and help Democrats hold onto their slim majority in the Senate. 

GOP candidates Bernie Moreno, state Sen. Matt Dolan, and Ohio Secretary of State Frank LaRose are all vying for the opportunity to take on Brown in November. Divisions within the party have formed, however, as Moreno has the support of Trump while Dolan is backed by Gov. Mike DeWine (R-OH). 

In Ohio’s 6th Congressional District, retiring Rep. Bill Johnson’s (R-OH) seat will be up for grabs in a special election to fill out the remainder of Johnson’s term as well as compete in the scheduled primary for a full term. In Ohio’s 9th Congressional District, several GOP candidates are competing for the opportunity to take on Rep. Marcy Kaptur (D-OH) in November. 

Those candidates include Ohio state Rep. Derek Merrin, Steve Lankenau, J.R. Majewski, and Craig Riedel. 

Ohio’s 13th Congressional District will also be on the ballot, as two Republican candidates, former state Sen. Kevin Coughlin or Hudson City Councilor Chris Banweg, challenge each other for the opportunity to take on Rep. Emilia Sykes (D-OH).

Meanwhile, Democrats are hoping to flip Ohio’s state Supreme Court in November, with Tuesday’s primary giving voters the choice between Democratic Judge Lisa Forbes, an 8th U.S. District Court of Appeals judge, and Judge Terri Jamison, a 10th District judge to take on Republican Dan Hawkins, a judge on the Franklin County Court of Common Pleas, for the court’s open seat. 

Delegates at stake: 127 for Democrats, 79 for Republicans

Polls close at 7:30 p.m. EDT.

Illinois

Both Biden and Trump will appear on the ballot in Illinois as the state holds both its Democratic and Republican primaries. Neither candidate is expected to face significant challenges in the state. 

Trump’s appearance on the ballot comes after the Supreme Court ruled earlier this month that states, including Illinois,  could not remove him from their ballots using the 14th Amendment. 

What to watch: Several congressional primary races are taking place in Illinois as well, most notably in the state’s 12th congressional district where Trump-endorsed incumbent Rep. Mike Bost (R-IL) is facing a challenger from his party’s hard-line flank. 

Darren Bailey, who has the support of firebrand Rep. Matt Gaetz (R-FL) and House Freedom Caucus member Mary Miller (R-IL), is part of a growing number of Republican candidates challenging incumbents from their own party.

Registered voters can participate in either party’s primary. 

Delegates at stake: 147 for Democrats, 64 for Republicans

Polls close at 8 p.m. EDT.

Kansas

One of Biden’s biggest challenges of the night will come in Kansas, where a “none of the names shown” option will be available to voters. 

The “uncommitted” vote push has followed the president throughout the 2024 primary cycle as he faces criticism over his support of Israel in its war against Hamas. It’s unclear how many voters will opt against voting for Biden in the state, but it is unlikely to stop the president from winning Kansas’s 33 delegates. 

The “none of the names shown” option will also appear on the Republican primary ballot. However, it is not expected to be a huge factor against Trump as he seeks to win the state’s 39 Republican delegates. Binkley, DeSantis, and Haley will appear on the ballot as well. 

Registered voters can only participate in their own party’s contest, however, independents can participate in either election. 

Delegates at stake: 33 for Democrats, 39 for Republicans

Most polls close at 8 p.m. EDT, with last polls closing at 9 p.m.

Arizona

Biden’s other biggest challenge of the night could come from Arizona, a state he won in 2020, beating Trump by only 10,457 votes. There is not an “uncommitted” vote option on Arizona’s Democratic ballot, however, the national Vote for Ceasefire campaign has organized supporters to vote for Williamson instead. 

If Biden loses a sizable amount of voters, it could be cause for concern for the president heading into his November rematch with Trump. 

Trump will also be seeking a strong turnout in the state as he looks to flip the state back in his favor in 2024. 

Delegates at stake: 72 for Democrats, 43 for Republicans

First polls close at 9 p.m. EDT, with most closing at 10 p.m.

California

The Golden State’s only race on Tuesday is the special election to fill McCarthy’s seat in California’s 20th Congressional District after he left Congress in December. 

Fong is favored to win the race, however, he must secure more than 50% of the vote, or he will be forced into a runoff election with the candidate who comes in second. 

Fong faces Tulare County Sheriff Mike Boudreaux, and Democrat Marisa Wood, among other candidates, for McCarthy’s seat. A separate primary to replace McCarthy beginning in January 2025 for a full term was held on March 5. In that primary, Fong received the most votes and will face Boudreaux in November. 

California’s 20th Congressional District is reliably red.

Polls close at 11 p.m. EDT.