WASHINGTON (AP) — The Trump administration asked the Supreme Court on Monday to clear the way for an executive order from President Donald Trump that could dramatically change mail-in voting.

The emergency appeal comes after an appeals court upheld a ruling blocking the president’s order in nearly half the country ahead of November’s midterm elections.

The Justice Department asked the Supreme Court to allow agencies to take steps to implement the changes while lawsuits play out.

The request comes shortly after Trump delivered a primetime address elevating his yearslong push to raise doubts about the legitimacy of elections, and could be one of several voting-related challenges before the court ahead of the high-stakes contest in November.

Trump ordered the government in March to create a “state citizenship list” of eligible voters and deliver mail ballots only to people on that list.

Democratic officials in 23 states and the District of Columbia sued, saying the Constitution gives states and Congress the authority to set election rules, not the president. Their attorneys have said Trump’s proposed changes are ripe for abuse and could cause chaos.

A judge in Massachusetts blocked the order for the plaintiff states, and a 1st U.S. Circuit Court of Appeals panel left her ruling in place over the weekend.

The executive order issued in March calls for U.S. Citizenship and Immigration Services and the commissioner of the Social Security Administration to create a federal list of eligible voters. It tells the U.S. Postal Service to deliver mail ballots only to people on that list.

The appeal argues that Trump’s order lays out “general policy guidance” and doesn’t directly dictate how states run their elections. Solicitor General D. John Sauer asked the high court to freeze the judge’s order, calling it “indefensible.”

“And the injunction is especially indefensible because the agencies are still deliberating over how (if at all) to implement the Order, yet the district court preemptively decided that whatever the agencies may choose to do will necessarily be unlawful,” Sauer wrote.

He urged the high court to move quickly, arguing that any new policies would have to be in place as soon as August to be effective for the November elections.

A response to the appeal is due Aug. 3.

Trump promoted the proposed changes as safeguards to keep non-U.S. citizens from voting. Noncitizen voting has been shown to be rare, and is a felony that can be punishable by deportation.

U.S. District Court Judge Indira Talwani in Boston, who was nominated by Democratic President Barack Obama, agreed in June to halt implementation for the Nov. 3 elections.

Lindsay Whitehurst, The Associated Press