Bottom line: The decision eliminates one of two pending challenges to the Trump USPS mail-in ballot rules.
What's happening: The 6-3 decision dismisses a lawsuit brought by states, including California, North Carolina, and Washington, which alleged that the disputed sections of the rules "neither requires nor forbids anything of anyone outside the executive branch." The court ruled that the states have no standing to sue because they have no direct stake in the dispute.
What to do: Security leaders should review their own policies on mail-in ballot security, as the Trump USPS rules may impact their own systems and procedures.