A federal judge hears arguments in lawsuits seeking to block President Donald Trump’s executive order that creates a federal voter list and places limits on mail voting. Voting rights groups are among the plaintiffs urging the court to halt the order while the cases proceed. A coalition of about two dozen states also asks the court to stop implementation, arguing that the order’s provisions raise legal and practical concerns for election administration. The cases are presented in court as challenges to how the federal voter list would be compiled and used, as well as how restrictions on mail voting would affect voters. Supporters of the order are expected to argue that it is intended to improve election integrity and standardize processes across jurisdictions. The judge’s review follows the filing of two lawsuits addressing different aspects of the executive order. A decision on whether to issue a temporary halt is not described in the provided reports.