Mr. Aborn, who was the last of the three candidates to begin raising funds, has collected an estimated $1.5 million total, according to his campaign. Since July 11, the Aborn campaign said about $120,000 has been raised. (The campaign had not filed its report by press time on Friday.)

As for cash available for the campaign’s final month, Ms. Snyder reported a war chest of $1.2 million, Mr. Vance reported $1.1 million, and the Aborn campaign estimated its reserves at $1 million.