The U.S. Supreme Court has declined to take on several significant cases, including Peter Navarro's appeal concerning the release of emails from his time in the Trump White House. The Court denied Navarro's request to block a lower court's ruling that mandates he hand over hundreds of emails under the Presidential Records Act. Additionally, the Supreme Court announced it would not rule on the right of taxpayers to request their own tax returns as public records. The Court also chose not to review whether the U.S. Environmental Protection Agency has the authority to permit California to establish its own greenhouse gas emissions standards for vehicles, a decision that has drawn challenges from red states claiming it is unconstitutional.