The rule, published Friday, follows an executive order signed by President Donald Trump in March directing the USPS to impose new requirements on mail-in voting.
Postmaster General David Steiner answered questions about the proposed rule during an appearance before the Senate Homeland Security and Governmental Affairs Committee.
The Trump administration has run the names of at least 67 million voters through government databases as it looks for noncitizens and people who've died.
The Trump administration has run the names of at least 67 million voters through government databases as it looks for noncitizens and people who've died.Open