Those people are distributed across the nation. If they were all in Columbus or Detroit you'd have an argument but in reality they're probably distributed roug

Those people are distributed across the nation. If they were all in Columbus or Detroit you'd have an argument but in reality they're probably distributed roughly the same way the general population is. There are ~150k voting precincts in the US. 300k people across the nation is probably on the order of a dozen at the most effected precincts. Opening half an hour earlier and closing half an hour later would have a larger effect on ensuring people get to vote.