RE: DeBlasio, or Letitia James, for example
Leticia James is the AG who is investigating Cuomo. The investigator becomes the replacement?
Not an unheard of motivation.
And DeBlasio may partly be dumping on Cuomo because he doesn't like him, but I'd say ambition plays a part. The Dem Party as a whole climbs on the backs of the producers, but within that Party, they are continually striving to achieve a higher rank. Typical of Party-run states.