Denise Toliver, a spokeswoman for the Board of Elections, said the special ballots — commonly known as “provisional” ballots elsewhere — account for voters who cast ballots on the same day they registered, residents who completed a change of address form, or people who voted in the wrong precinct.

Some of those voters will now have to validate their ballots at the Board of Elections for their votes to be counted. “Some people did same-day registration, and they had no proof of residency, so they have 10 days to come in to show their proof of residency,” Toliver said.

Leaving the Board of Elections on Wednesday morning, White said his team was already looking into ways to bring supporters back to validate their ballots. He also called for fairness in the final count, and he warned of a recount if the provisional ballots break in May’s favor.