Early voting is already underway in Connecticut and starts for New York and New Jersey on Saturday.
Democratic incumbent Gov. Kathy Hochul highlighted insurance fraud and Republican challenger Bruce Blakeman pointed to rising electricity costs on Tuesday.
Both candidates for governor were in New York City on the campaign trail Monday.
Federal authorities have charged 28 foreign nationals in California who authorities said have illegally registered and voted in U.S. elections.
With the midterm elections 17 days away, supporters of the "No Kings" movement gathered across the country Saturday to encourage voter participation as early voting approaches.
Federal law enforcement officers said they are working to intercept the letters.