We just had a Federal Election in Canada. We used paper ballots and the results were in by midnight. I had only one choice to make.
This isn't possible in the USA because American vote for many different candidates when they have an election. The ballots can be very complicated but you can always vote "straight Republican" or "straight Democrat" to simplify the process. Here's how voting machines work .... or not.
[Hat Tip: Mike the Mad Biologist]