Absent power failures or natural disasters, there is only one reason to extend voting hours: committing fraud. Real, living, sane, responsible people will get to the polls and at least be in line at the close; if you’re in line, you vote in most places. The reason they want extended hours, especially extended hours granted by a sympathetic judge late in the day, is so they can shake out their lists of people who are “registered” but who haven’t voted, load up the vans, and have them go vote. So long as their isn’t a picture ID requirement, and even if there is in safely D precincts, anybody can show up and vote as whatver name hasn’t voted yet. It’s Voter Fraud 101.