In the United States , it has been common to report turnout as the sum of votes for the top race on the ballot .
Not all jurisdictions report the actual number of people who went to the polls nor the number of undervotes or overvotes .
In the United States , it has been common to report turnout as the sum of votes for the top race on the ballot , because not all jurisdictions report the actual number of people who went to the polls nor the number of undervotes or overvotes .