Gov. Phil Murphy hopes to enact the change in New Jersey, but opponents say same-day registration would be costly, unnecessary and complicated at the polls.
The concept is similar to that of a runoff election, held when no candidate receives at least 50% of the original vote, but the difference is that this approach only requires one round of actual voting.
Progressive activists say New Jersey should follow the lead of New York City and allow noncitizens legally living here the right to vote in local elections.
Whether due to connectivity issues or user error, some polling places had problems with the new voting system. Hotlines are available to help resolve issues.
Nine days of early voting are being held in New Jersey for the first time, from Oct. 23 to Oct. 31. There are between three and 10 sites in each county.