The USPS has one job when it comes to elections: deliver the mail. That's it. States run elections not the postal service. Any interference by USPS in who receives a ballot or when it arrives is a direct threat to the democratic process. Congress needs to make that boundary crystal clear.
Mail ballots are legal, widely used, secure and administered by state and local officials. The moment USPS starts slowing, holding, or otherwise disrupting ballot delivery, it's no longer a neutral carrier; it's a political actor. That's unacceptable. Pass legislation that requires USPS to treat election mail as the highest delivery priority and prohibits any action that delays or withholds ballots from eligible voters.