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A big night in the Democratic presidential primary will take place this Tuesday, March 17 — but not as large as was planned.

Three states — Arizona, Florida, and Illinois — will hold their primaries then; until this week, Ohio was set to join them, but Gov. Mike DeWine announced late on Monday that the state would delay in-person voting over the coronavirus outbreak.

March 17 is still one of the biggest delegate-awarding days of the primary calendar, behind Super Tuesday and a still-to-come slew of Eastern seaboard primaries on April 28. Florida has the most delegates on offer Tuesday, with 219.

Voters in those states will be confronted with a much-reduced presidential field when they head to the polls: Only former Vice President Joe Biden and Sen. Bernie Sanders are still in the running for the nomination, though Rep. Tulsi Gabbard, with two delegates, is technically still in the race.

Biden leads in the FiveThirtyEight state-level polling averages for all four states and is expected to claim a sweep on Tuesday. In particular, Florida is expected to be a strong state for the former vice president.

Before Ohio’s postponement, Harry Enten, a senior politics analyst for CNN with a focus on polling, projected that Biden could net around 200 delegates across the four states on Tuesday. A win of that magnitude would severely imperil Sanders’s chances for the nomination.

Follow along below for Vox’s coverage of the March 17 primaries, including live results, breaking news updates, analysis, and more.

  • Emily Stewart

    Emily Stewart

    Who is winning the March 17 delegate count so far

    Joe Biden at the Hotel Du Pont in Wilmington, Delaware on March 12, 2020.
    Joe Biden at the Hotel Du Pont in Wilmington, Delaware on March 12, 2020.
    Joe Biden at the Hotel Du Pont in Wilmington, Delaware on March 12, 2020.
    Michael Brochstein/Echoes Wire/Barcroft Media via Getty Images

    Joe Biden continued to widen his delegate lead over Bernie Sanders during the latest round of voting in the 2020 Democratic Party primary.

    On Tuesday, March 17, three states voted: Florida, Illinois, and Arizona. Ohio was also scheduled to vote on Tuesday, but amid fears of the spread of coronavirus and encouragement of social distancing, Republican Gov. Mike DeWine successfully delayed voting in the state until June 2.

    Read Article >
  • Ella Nilsen

    Ella Nilsen, Emily Stewart and 1 more

    3 winners and 3 losers from Tuesday’s Democratic primaries

    Joe Biden meets with workers and Detroit Mayor Mike Duggan at the Fiat Chrysler plant in Detroit, Michigan, on March 10, 2020.
    Joe Biden meets with workers and Detroit Mayor Mike Duggan at the Fiat Chrysler plant in Detroit, Michigan, on March 10, 2020.
    Joe Biden meets with workers and Detroit Mayor Mike Duggan at the Fiat Chrysler plant in Detroit, Michigan, on March 10, 2020.
    Mandel Ngan/AFP via Getty Images

    We may be living in a vastly different world than we were a week ago, but one constant remains: Joe Biden appears well on his way to being the presumptive Democratic nominee.

    Right out of the gate on Tuesday night, Biden notched a nearly 40-point win in Florida, the state with the biggest cache of delegates. He followed it up soon after with another resounding win in Illinois and won Arizona shortly after polls closed there.

    Read Article >
  • Cameron Peters

    Cameron Peters

    Marie Newman unseats one of the last anti-abortion Democrats in Illinois’s 3rd District

    Marie Newman
    Marie Newman
    Marie Newman at a campaign event in Washington, DC, on January 17, 2018.
    Bill Clark/CQ Roll Call via Getty Images

    After well over two years of trying by progressive Democrats, Rep. Dan Lipinski will no longer represent Illinois’s Third Congressional District in the House.

    Challenger Marie Newman defeated the longtime representative — who’s also one of the last remaining anti-abortion Democrats — in the Democratic primary on Tuesday night.

    Read Article >
  • Cameron Peters

    Cameron Peters

    5 key congressional races to watch on March 17

    Amanda Northrop/Vox

    Despite concerns over the coronavirus pandemic, three of the four states scheduled to hold presidential primaries this Tuesday, March 17, went ahead as planned (Ohio did not). In Illinois, the Democratic presidential race wasn’t the only one on the ballot.

    In addition to its presidential primary, Illinois also had a slate of congressional primaries on tap for this Tuesday. Of particular interest: a pair of progressive primary challenges to longtime Democratic House members, and three Republican primaries — two House, one Senate — to challenge Democratic lawmakers come November.

    Read Article >
  • Jane Coaston

    Jane Coaston

    Despite coronavirus, 2 states are holding GOP primaries Tuesday

    Amanda Northrop/Vox

    Two states — Florida and Illinois — are holding Republican primary contests on Tuesday, and President Donald Trump is certain to win both. He currently leads the delegate count with 1,113 delegates to former Massachusetts Gov. Bill Weld’s one.

    But as with everything else, these primary states are facing the added challenge of counteracting the spread of coronavirus — in Florida, for example, there have been nearly 150 positive cases of the novel coronavirus detected since March 1. Each state is taking action: Florida has moved multiple voting locations to avoid areas where those most vulnerable to the virus (namely older Floridians) would be present. Illinois, which has had more than 90 positive cases of the coronavirus, has moved 168 Chicago-area polling places that were located in senior living facilities, and the state extended early voting hours in Chicago and other areas of the state.

    Read Article >
  • Emily Stewart

    Emily Stewart

    Joe Biden wins the Illinois primary

    Joe Biden speaks to guests at the Rainbow PUSH Coalition Annual International Convention in Chicago, Illinois on June 28, 2019.
    Joe Biden speaks to guests at the Rainbow PUSH Coalition Annual International Convention in Chicago, Illinois on June 28, 2019.
    Joe Biden speaks to guests at the Rainbow PUSH Coalition Annual International Convention in Chicago, Illinois on June 28, 2019.
    Scott Olson/Getty Images

    Former Vice President Joe Biden has won the Democratic presidential primary in Illinois, gaining more ground as the party’s 2020 frontrunner.

    The former vice president has been steadily gaining momentum following the South Carolina primary, Super Tuesday, and the March 10 primaries. And he came into Tuesday, March 17, well positioned to win in multiple states, including Illinois, the state his former boss Barack Obama represented in the US Senate. While some polling showed a small lead in the state for Sen. Bernie Sanders in February, by March, polling gave Biden a commanding lead.

    Read Article >
  • Matthew Yglesias

    Matthew Yglesias

    Joe Biden wins the Florida Democratic primary

    Joe Biden greets members of the audience at the Democratic debate in Miami, Florida, on June 27, 2019.
    Joe Biden greets members of the audience at the Democratic debate in Miami, Florida, on June 27, 2019.
    Joe Biden greets members of the audience at the Democratic debate in Miami, Florida, on June 27, 2019.
    Drew Angerer/Getty Images

    Former Vice President Joe Biden has won Florida’s Democratic primary, in the exact opposite of a political surprise.

    Even before Biden jumped out to what appears to be a dominating national polling lead over Sen. Bernie Sanders, the state looked set to be one of the friendliest contests for him.

    Read Article >
  • Li Zhou

    Li Zhou

    The chaotic delay of the Ohio primary, explained

    Polling stations throughout Ohio were shut down on March 17, 2020, as Gov. Mike DeWine called for the state’s primary to be pushed back to June.
    Polling stations throughout Ohio were shut down on March 17, 2020, as Gov. Mike DeWine called for the state’s primary to be pushed back to June.
    Polling stations throughout Ohio were shut down on March 17, 2020, as Gov. Mike DeWine called for the state’s primary to be pushed back to June.
    Gene J. Puskar/AP

    After a tumultuous 24 hours, the Ohio primary is officially delayed.

    Early Tuesday morning — shortly before polls were originally set to open — a panel of four Ohio Supreme Court judges voted unanimously to effectively back the state’s efforts to close its polls. The decision followed a chaotic back-and-forth between Gov. Mike DeWine and a court in Ohio’s Franklin County on Monday, which raised questions over whether the governor had overstepped the limits of his office in his attempts to postpone the primary.

    Read Article >
  • Sean Collins

    Sean Collins

    Who will win all of Tuesday’s primaries, according to the polls

    Poll workers help voters during the Florida presidential primary on March 17, 2020 in Miami, Florida.
    Poll workers help voters during the Florida presidential primary on March 17, 2020 in Miami, Florida.
    Poll workers help voters during the Florida presidential primary on March 17, 2020 in Miami, Florida.
    Joe Raedle/Getty Images

    Three more states — Illinois, Florida, and Arizona — will vote in the 2020 Democratic primary Tuesday. And even with possibly depressed turnout due to coronavirus, the results don’t seem hard to predict.

    According to the polls, former Vice President Joe Biden will likely win all of the day’s contests.

    Read Article >
  • Cameron Peters

    Cameron Peters

    When polls close on March 17 — and when we might get results

    Former Vice President Joe Biden at a campaign event in St. Louis, Missouri, on March 7, 2020.
    Former Vice President Joe Biden at a campaign event in St. Louis, Missouri, on March 7, 2020.
    Former Vice President Joe Biden at a campaign event in St. Louis, Missouri, on March 7, 2020.
    Dilip Vishwanat/Getty Images

    Despite a wave of cancellations and postponements in response to the Covid-19 coronavirus pandemic — with everything from the NBA to Broadway on hold — three states are set to go forward with their presidential primaries as scheduled on Tuesday, March 17.

    Voters in Arizona, Florida, and Illinois will all vote in what is expected to be another good day for former Vice President Joe Biden.

    Read Article >
  • Li Zhou

    Li Zhou

    It looks like Ohio’s primary won’t be happening on Tuesday after all

    A woman cast her vote at at a church polling location on November 6, 2018 in Cambridge, Ohio. 
    A woman cast her vote at at a church polling location on November 6, 2018 in Cambridge, Ohio. 
    A woman cast her vote at at a church polling location on November 6, 2018 in Cambridge, Ohio.
    Justin Merriman/Getty Images

    The Ohio primary is now off.

    According to Gov. Mike DeWine, who had urged courts to delay the election, Ohio’s state health director Amy Acton has declared a health emergency and closed the polls — which were scheduled to open Tuesday — as a result.

    Read Article >
  • Zeeshan Aleem

    Despite concerns about coronavirus, Tuesday’s primaries are on

    Voters wait in line at a fire station. They are not six feet apart in line, as the CDC currently recommends.
    Voters wait in line at a fire station. They are not six feet apart in line, as the CDC currently recommends.
    Voters participate in Virginia’s Super Tuesday primary.
    Chip Somodevilla/Getty Images

    The spread of the novel coronavirus across the US is seriously complicating the Democratic presidential primary season.

    On Saturday, Georgia announced it would postpone its March 24 primary, following Louisiana’s decision to move its April 4 contest — both states cited concerns over the spread of the coronavirus as the reason. Georgia moved its primary to May 19; Louisiana will hold its primary on June 20.

    Read Article >