A judge in Massachusetts stopped President Trump's plan to change how elections work in the U.S. The judge agreed with some Democratic lawyers who said Trump's plan was against the law. Trump's order in March wanted people to show they were citizens to vote. It also said that mail-in votes must arrive by Election Day. And it said states had to follow these rules to get money for elections. The White House said this would make elections "free and fair." But the judge, Denise J. Casper, said the states would probably win because the President does not have the power to make these election rules. The judge also stopped the part of the order that said they would not accept mail-in votes after Election Day. This is the second time a judge has stopped parts of Trump's election order.