Rights groups have raised concerns about Trump’s efforts to change election administration before November’s midterms.

About two dozen Democrat-led states have filed a lawsuit against the administration of United States President Donald Trump to block an executive order setting new limits on mail-in ballots.

Friday’s lawsuit comes as voting rights groups charge that Trump is seeking to make it more difficult to vote before the consequential midterm elections in November.

Trump, meanwhile, has argued that his efforts are meant to counter rampant voter fraud in US elections.

That opinion runs counter to the findings of independent election monitors, including the conservative Heritage Foundation, whose decades-spanning database has found an exceedingly low rate of election fraud.

New ‌York Attorney General Letitia James was among the attorneys general in 23 states and the District of Columbia who filed Friday’s suit, alongside the governor of Pennsylvania.

In a statement, she argued that Trump’s executive order exceeded his presidential power.

“Free and fair elections are the cornerstone of our democracy, and no president has the power to rewrite the rules on his own,” James said.

Trump’s latest executive order, signed on Tuesday, calls on the Department of Homeland Security to “compile and transmit” a list of United States citizens who are eligible to vote in each state.

It then requires the United States Postal Service (USPS) to “transmit ballots only to individuals enrolled on a State-specific Mail-in and Absentee Participation List, ensuring that only eligible absentee or mail-in voters receive absentee or mail-in ballots”.

Voting rights groups have said the measures would likely rely on an incomplete federal list of US citizens and would heap too much responsibility on USPS.

Mail-in voting has increased across the US, in states that lean both Republican and Democratic, particularly after the COVID-19 pandemic. In the 2024 elections, a third of all ballots were cast by mail.

In Friday’s lawsuit, the states argue that Trump’s order violates the US Constitution, which says that state officials decide the “times, places and manner” of elections.

The states further maintain that only Congress can pass new restrictions related to how elections are conducted. Forcing a change to election administration so close to the November elections will also create chaos, according to the lawsuit.

The midterm elections will determine which party controls the US House of Representatives and Senate.

Trump has previously voiced concern that he may face impeachment proceedings, should the Republican Party see its majorities in both chambers disappear.

For years, Trump has maintained, without evidence, that his 2020 election loss was the result of widespread fraud, and he has pledged reforms to the voting system.

He previously signed executive orders seeking to overhaul US election administration, although they have been mostly blocked by the court system.

The Department of Justice has also sued several states in an attempt to gain access to voter information, and the FBI seized ballots from the 2020 election during a raid last January in Fulton County, Georgia, further stoking concerns.

Trump, meanwhile, has been pushing lawmakers to pass the “SAVE America Act”, which would require increased proof of US citizenship when registering to vote, including a birth certificate or a passport, as well as a photo ID to cast a ballot.

Rights groups have warned the measures could disenfranchise many voters, including women who changed their last name upon marrying.