New system for screening mail-in ballots risks denying entire batches, says whistleblower

US senator says that project, a key part of Trump’s voting restrictions, is ‘perilously rushed and potentially unlawful’ A new system to screen millions of mail-in ballots for this November’s US midterm elections was thrown together so hastily, and tested so little, that a single scanning glitch could see entire batches of ballots turned away, a whistleblower has told Congress.