The Supreme Court of the United States has turned down President Donald Trump’s proposal to limit mail-in voting before November’s midterm elections. The federal judge’s ruling has been upheld by the justices in a temporary stay that bars the United States Postal Service (USPS) from enforcing strict new rules about postal ballots.

The decision is a major setback for The White House. President Trump went on social media to lambaste the conservative-heavy court for issuing another “lousy ruling” and were “unpatriots.”

The lawsuit is based on an executive order signed by Trump in March that ordered the USPS to send ballots only to voters on a certain citizenship list and required new ballot-tracking systems. Election officials in 24 Democratic-led states had the ability to successfully press that the abrupt changes infringed on states’ constitutional rights to independently run elections. State officials also said that a sudden transformation in the rules would cause a lot of trouble and delays before the elections.

The Supreme Court had allowed the temporary injunction, but Justices Samuel Alito and Clarence Thomas, both conservatives, disagreed, as they saw the challenge to the executive order as having little legal teeth. Justice Brett Kavanaugh agreed with the majority that the new rules for the upcoming elections were arbitrary and capricious; as such, he blocked the new rules. He said he would be open to the administration’s greater overall authority as the case moves through the U.S. Courts system, though.

The Trump administration has long insisted that the rule modifications are constitutional because states do not want to have to follow the USPS’s rules while being able to use the postal system. The administration and its state Republican allies have spoken of allegations of election fraud which they have raised on numerous occasions, even as civil rights groups have warned their proposed restrictions would “deliberately cause confusion.

Local election officials around the country are continuing with their regular mail-in voting practices as the midterm elections get closer to determine the next political party to control the United States Congress. Several states, including Colorado, Oregon and Washington, use only postal ballots, and have been mailing out printed voting materials before the court’s ruling, meaning late-stage rule changes would be impossible without significant financial and logistical disruption.