Wisconsin is asking hundreds of thousands of voters to ignore a stay-at-home order in the midst of a pandemic to participate in Tuesday’s presidential primary election, becoming a test case for dozens of states struggling to balance public health concerns with a core pillar of democracy.

The National Guard will help run voting sites across the state after thousands of election workers stepped down, fearing for their safety. Dozens of polling places will be closed, but those that are active opened at 7 a.m. CDT.

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Results are not expected to be released Tuesday night. In the wake of a legal battle over whether to conduct the election as scheduled, a court ruling appeared to prevent results from being made public earlier than April 13.

The Election Day chaos that loomed over Wisconsin, a premier general-election battleground, underscored the lengths to which the coronavirus outbreak has upended politics as Democrats seek a nominee to take on President Donald Trump this fall.

Joe Biden hopes the state will help deliver a knockout blow against Bernie Sanders in the nomination fight, but the winner of Tuesday’s contest may be less significant than Wisconsin’s decision to allow voting.

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Its ability to host an election under the lash of a growing pandemic could have significant implications for upcoming primaries and even the fall general election.

“This is a warning sign for November and a problem that states need to take all steps to avoid,” said Wendy Weiser, director of the Brennan Center for Justice’s democracy program. “Americans should not have to choose between their health and their right to vote.”

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Democrats in and out of Wisconsin screamed for the low-profile contest to be postponed, yet Republicans — and the conservative-majority state Supreme Court — would not give in. The partisan split was colored by a state Supreme Court election in which a lower turnout was thought to benefit the conservative candidate.

While Trump’s health advisers encouraged all Americans to stay home, Wisconsin Republican Party Chairman Andrew Hitt downplayed the heath concerns. The state had reported nearly 2,500 coronavirus infections and 77 related deaths as of Monday night.

“Wisconsin voters are pretty determined,” Hitt said, noting that Wisconsin residents are still going to the grocery store, the liquor store and even boating stores classified as essential businesses. “I can’t really think of something more essential than voting.”

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Hitt said he would be among those voting in person Tuesday, even though he did not have a mask to cover his nose and mouth. On Friday, Trump recommended that all Americans wear masks if they leave their homes.

“I don’t have one. I’m sure most of Wisconsinites don’t have masks,” Hitt said. “This isn’t New York City.”

On the day before the election, it was unclear for hours whether polls would open at all.

»MORE: Wisconsin primary still on despite coronavirus pandemic

Wisconsin Gov. Tony Evers issued an executive order Monday afternoon to postpone the election. Less than four hours later, the state Supreme Court sided with Republicans who said Evers didn’t have the authority to reschedule the race on his own.

Conservative justices on the U.S. Supreme Court quickly followed with a 5-4 ruling that overturned a lower court’s decision expanding absentee voting.

Evers himself had questioned whether he had the power to reschedule the election, but he said the worsening situation, including an increase in COVID-19 deaths, made clear there was no way to safely move forward. The first-term Democrat said he sought the delay because he was motivated by protecting public health, not politics.

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“The people of Wisconsin, the majority of them, don’t spend all their waking hours thinking about are Republicans or Democrats getting the upper hand here,” Evers said. “They’re saying they’re scared. They’re scared of going to the polls.”

»MORE: U.S. Supreme Court weighs in on Wisconsin election

With the U.S. Supreme Court decision, voters found no extra time for absentee voting. The court said absentee ballots must be hand-delivered by Tuesday evening or postmarked by Tuesday, although they can arrive at clerks’ offices as late as April 13. Wisconsin election officials said the high court’s order left intact a provision of the lower-court order that no returns be reported until that day.

In dissent, Justice Ruth Bader Ginsburg wrote that the coronavirus outbreak had caused a surge in absentee ballot requests and thousands of voters who requested them will not have received their ballots by Tuesday.

“The Court’s order, I fear, will result in massive disenfranchisement,” she wrote.

In response to the decisions by the Republican-controlled Legislature and the state Supreme Court, Sanders called holding the election amid the virus outbreak “dangerous” and “may very well prove deadly.” The Sanders campaign will not engage in traditional get-out-the-vote efforts, he said.

Meanwhile, critics raised the prospect of major Election Day complications, particularly given that thousands of poll workers stepped down. That led the state’s largest city, Milwaukee, to reduce its planned number of polling sites from 180 to five.

More than 2,500 National Guard troops were dispatched to staff the polls, where they were expected to help perform the normal functions of poll workers while also distributing hand sanitizer. In Madison, city workers erected Plexiglas barriers to protect poll workers, and voters were encouraged to bring their own pens to mark the ballots.

The Associated Press contributed to this report.