President Trump’s attack on mail-in voting is roping in the U.S. Postal Service. Under a new proposal introduced on Friday, the USPS would force states to hand over the names and addresses of residents who vote by mail. States would also be required to provide the agency with names and barcodes linked to mail-in ballots for federal elections.  The proposal is the latest development in the president’s crusade against mail-in voting, in which states proactively send out ballots to all eligible voters. Trump has vowed to “lead a movement to get rid of mail-in ballots,” which he has falsely linked to debunked claims of voter fraud during the 2020 election. Mail-in voting is widely praised as an accessible, secure way to encourage voter turnout, but the practice has found itself in the crosshairs during both of Trump’s terms in office. “Mail-in voting means mail-in cheating. I call it mail-in cheating, and we got to do something about it all,” Trump said earlier this year.…