(Bloomberg) — A US appeals court rejected the Justice Department’s request to let federal officials fully move ahead with Donald Trump’s overhaul of mail voting ahead of the November midterm elections, leaving in place a Boston judge’s order that declared the president’s policies unlawful.

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A three-judge appellate panel said it would not pause a lower court ruling that barred federal agencies from immediately enforcing Trump’s executive order in almost two dozen states and the District of Columbia where Democratic officials sued.

Several other legal challenges are pending against the president’s directives, including a lawsuit brought by the Democratic National Committee and party leaders in Congress.

The Justice Department signaled in earlier court filings that it would consider taking the fight to the US Supreme Court. While the Boston judge’s injunction doesn’t apply nationwide, it’s considered a significant impediment to the administration’s ability to carry out Trump’s executive order for the November vote.

Advocates across the political spectrum are vying to swing election-related legal fights in their favor before November, when Republicans will defend tight margins of control in both chambers of Congress.

The majority of the panel of the US Court of Appeals for the 1st Circuit found that at this early stage of the case, the states that sued presented enough evidence that they were being harmed by the president’s actions and had standing to press their claims.

“All told, between the compressed timelines and anticipated changes to states’ election processes, the summary judgment record indicates that the EO has already ‘produced an incredible strain’ on state election officials and their teams,” Judges Gustavo Gelpí and Julie Rikelman wrote in a joint opinion, referring to Trump’s executive order. Both judges were appointed by former President Joe Biden.

Judge Joshua Dunlap, an appointee during Trump’s second term, partially dissented, writing that he would have allowed a section of the challenged order that directed the Department of Homeland Security to prepare a list of potentially eligible US citizen voters as guidance for states, which run elections, to go ahead.