(CNN) – As the political world comes to grips with revelations of New York Gov. Eliot Spitzer's involvement in a high-priced prostitution ring, former New York City Mayor Ed Koch told CNN's Wolf Blitzer that he thought Spitzer's behavior was "irrational."
"I think there's a screw loose," says Koch. "I believe that his behavior, beginning with his becoming governor, has been irrational. And, what he did is to indicate that he doesn't play by the regular rules, that regular rules don't apply," Koch adds.
Koch also shares his thoughts on Spitzer's political future and whether he thinks Spitzer was targeted by political enemies in New York.
–CNN Associate Producer Martina Stewart