A U.S. federal judge has stopped part of a new order from President Donald Trump that aimed to change how elections are run. The judge, Colleen Kollar-Kotelly, said Trump’s order went too far by trying to force voters to show proof of U.S. citizenship when registering to vote. This rule would have applied at the state level, and states that didn’t follow it could have lost federal funding.

The judge said that only Congress and the states have the power to make rules about federal elections — not the president. She added that the people suing the government, including the Democratic Party, were likely to win the case.

The judge’s decision stopped the rule about showing citizenship proof, but she allowed another part of the order to stay. That part says states must set a deadline for mail-in ballots that matches the closing time of polls on Election Day.

Even though being a U.S. citizen is required to vote in federal elections, many states don’t ask voters to show papers proving their citizenship. Critics said Trump’s order could have made it harder for many people to vote and was an overreach of power.

Legal experts, like UCLA law professor Richard Hasen, called Trump’s order a “power grab” and said it could hurt the U.S. election system. Hasen also pointed out that Trump is still talking about election fraud from 2020, even though those claims have been widely proven false.

Since Trump returned to office on January 20, many of his executive orders have quickly been challenged in court. On the same day as this ruling, another judge also blocked his plan to cut money from cities that protect undocumented immigrants.