https://www.nytimes.com/2014/09/25/opinion/long-lines-at-min...
https://en.wikipedia.org/wiki/Voter_suppression_in_the_Unite...
Elections are mostly regulated at the state and county level, which causes a lot of disparities in registration law and polling place funding. Invariably every election during the non-stop coverage, you'll see the pictures of the long lines wrapped around blocks in cities throughout the country, but especially in Republican controlled swing states. I think it's an utter failure of our society that we can't hold elections with fair and accessible voting methods.
'Democracy in America', by Alexis de Tocqueville is still about as valid today as when it was written. In that he describes this scene where townspeople literally shoot at a farmer to keep him away from the polls. Not all that different than the gun toting individuals who show up to polling places today to 'protect' the vote.
Really, that's how it is in US? Any semi-decent country is responsible for creating comfortable conditions for anyone to vote.
Here in Poland there were 28k voting offices for 30 million of potential voters, so there's on average little more than 1k voters per office. It is almost impossible to be waiting in line for more than 5-10 minutes, even in the most crowded offices.