At the end of July, several water systems from Minnesota to Georgia suddenly went offline. While officials restored them, cybersecurity experts now say the outages may have been caused by Iranian hackers, raising larger questions about the security of America’s critical resources.

In a recent speech, President Donald Trump discussed foreign interference, noncitizen voting and vulnerabilities in the American election system — reiterating some widely disproven charges. The administration released a trove of heavily redacted documents.

The court was hearing arguments Monday in a case from Mississippi that also could affect voters in 13 other states and the District of Columbia, which have grace periods for ballots cast by mail.

The Trump administration is pushing states to hand over their full voter rolls, or list of actively registered voters. The administration has sued more than 20 states and Washington, D.C., in an attempt to secure the sensitive information.