The billionaire mayor gave the state Independence Party $1.2 million last year. About $750,000 of that went to a political operative but its purpose has not been accounted for.
The mayor's campaign says the operative was hired to perform ballot security work on Election Day. That work includes paying poll watchers and covering their Election Day expenses.
Bloomberg said Monday he doesn't know what happened. He added that the district attorney has asked him not to comment beyond that.