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This article was originally published by Votebeat, a nonprofit news organization covering local election administration and voting access.

What happened?

The U.S. Supreme Court on Monday lifted one of two injunctions against President Donald Trump’s executive order restricting mail voting, but additional legal hurdles and practical considerations could make it difficult to implement it in time for the quickly approaching November elections.

The unsigned ruling, which cut along ideological lines, focused on a relatively narrow legal question: whether the lower court’s injunction was premature. The majority made it clear that it was not deciding on the legality of Trump’s order as a whole, which is certain to be quickly challenged again in court as the administration moves to put its provisions in place.

“The court’s disposition of this application does not mean that any measure taken by the government to implement the order will necessarily be lawful,” the majority wrote. “On that score, time will tell.”

The ruling, made in response to an emergency request, didn’t specify which justices had joined it. Justice Ketanji Brown Jackson, who dissented, warned that the ruling would create a “Kafkaesque nightmare” that “needlessly injects chaos and uncertainty into the upcoming midterm elections.” Justice Sonia Sotomayor wrote a separate dissent, joined by Justice Elena Kagan.

What’s the dispute?

Shortly after Trump issued his executive order in March, states, nonprofit organizations and Democratic Party committees filed multiple lawsuits seeking to block it. In June, in the case brought by states, U.S. District Judge Indira Talwani found that some key provisions of the order were unconstitutional and blocked them from going into effect for this year’s elections.

Talwani issued an injunction specifically preventing the federal government from enforcing those provisions of the order against the 24 jurisdictions (23 states and the District of Columbia) whose attorneys general and governors brought the lawsuit. The list included most Democratic-led and swing states, including Arizona, California, Michigan, Nevada, New York, North Carolina, Pennsylvania, and Wisconsin.

The Trump administration appealed, arguing the judge’s order was issued prematurely, before the Postal Service and other relevant agencies had finalized their plans to carry out the order’s provisions. The administration also argued that the injunction prevented it from implementing the order in the unaffected states because of the logistical impossibility of a bifurcated mail-voting system.

The 1st U.S. Circuit Court of Appeals upheld Talwani’s order in late July, prompting the administration to ask the U.S. Supreme Court to lift the order and allow the agencies to act in time for the November election. In filings, the states warned that “the consequences of allowing such transformative changes to take effect so close to this fall’s elections would be extreme” and would disenfranchise voters.

On Aug. 11, Talwani issued a separate injunction against the order in the lawsuit brought by nonprofit groups, led by the League of Women Voters. The decision made it clear that her ban on implementing the law extended to all states, not just the 24 jurisdictions that brought the other lawsuit. That ruling again rejected the Trump administration argument that it was too soon to address the underlying issues.

The Trump administration again asked the Supreme Court to issue a ruling and make it clear that it would also apply to the Aug. 11 court order. If not, Solicitor General D. John Sauer warned in a court filing, it would require prolonged legal battles that would “effectively run out the clock” on the government’s ability to implement its plans.

On Friday, while the administration’s request was still pending before the Supreme Court, the Postal Service issued its final rules for implementing the order, which it said it would not put into effect for this November’s election unless and until the Supreme Court cleared the way.

The Supreme Court’s ruling addressed neither the second injunction nor the fact that the Postal Service had issued final rules, leaving observers to wonder about how those developments might affect what happens next.

“I expect that the trial court will now amend (the second) injunction and issue a new injunction that will stop USPS from implementing its now final rule. And that too may end up at the Supreme Court within a week,” wrote Rick Hasen, an election law professor at UCLA, on the Election Law Blog shortly after the ruling.

What happens now?

The Supreme Court’s ruling Monday will not be the final word on Trump’s executive order. The question before the Supreme Court was a relatively narrow one about whether Talwani issued her order prematurely, before the government had taken final action to carry out the executive order. The states and voting rights groups are likely to go back to court quickly to challenge the Postal Service and the final rules it issued last week.

Talwani has also not yet ruled on whether the order can go into effect for future elections, which she found would be premature. A parallel case involving consolidated challenges brought by nonprofit groups and Democratic Party committees is pending in federal court in Washington, D.C.

Should Trump’s executive order go into effect, it would mandate the creation of a series of lists. The Department of Homeland Security would be required to send each state a list of citizens over the age of 18. States using mail ballots would be required to send the federal government a list of all registered voters to whom they are sending mail-in and absentee ballots in key federal elections. The Postal Service’s final rule states that it will decline to deliver mail-in ballots in states that do not provide that list.

The order would also create new design standards and ballot-tracking requirements for mail ballots. Creating such a complicated process before November presents a huge challenge for the cash-strapped Postal Service.

Read more Votebeat coverage of Trump’s executive order on elections:

Dion Nissenbaum is Votebeat’s senior national reporter and is based in Houston. Contact Dion at dnissenbaum@votebeat.org.

Carrie Levine is Votebeat’s editor-in-chief and is based in Washington, D.C. Contact Carrie at clevine@votebeat.org.

Votebeat is a nonprofit news organization reporting on voting access and election administration across the U.S. Sign up for Votebeat’s free weekly newsletter to get the latest.

Dion Nissenbaum is Votebeat's senior national reporter. Dion spent much of his career as a Wall Street Journal foreign and national security correspondent based in Afghanistan, Lebanon, Turkey, Belgium and Washington. He spent four years based in Jerusalem and is author of the 2015 nonfiction book "A Street Divided: Stories from Jerusalem's Alley of God." He is a two-time Pulitzer Prize finalist for international reporting. He is also a filmmaker, most recently of "Who Killed Shireen?" about the killing of journalist Shireen Abu Akleh.

Carrie Levine is Votebeat's editor-in-chief. She was previously a senior reporter for the Center for Public Integrity, where she covered voting access, money in politics and influence. Before that, she was research director at Citizens for Responsibility and Ethics in Washington (CREW), a nonpartisan watchdog group. A graduate of Boston University and the Columbia University Graduate School of Journalism, she is based in Washington, D.C.