At one point the union spent more than $1 million on television advertising attacking the Mayor.
The hospital group and the union spent an additional $1 million on their own, for a total of $3.85 million last year.
The teachers' unions are spending a lot of money to fight this.
In 1995, the unions spent $35 million on such activities, although the Republican leaders dispute that figure.
According to the report, the union spent $562,699 on lobbying in 2000.
The union spent $1.3 million on the campaign, or $9,000 for each worker who voted to join.
The union will spend the next few days talking to players to keep them abreast of developments.
Beginning in 1976, the union spent $250,000 a year to sponsor football games on radio.
Republicans asserted that the unions spent far more than $35 million in the campaign.
His union will spend £1.5m over the next two years in an attempt to increase individual membership.