Simple. Rivera's bosses at NBC have vetoed his political plans.
TV Guide cites a letter to Rivera from NBC News Vice President David Corvo indicating that a 2001 mayoral candidacy would conflict with the flamboyant host's reporting role for the network. Rivera is the host of CNBC's "Rivera Live" as well as a documentary producer for NBC.
"It's tricky with Geraldo because he wears different hats for us," Corvo said. "But we didn't even want to have the perception that his political ambitions were affecting the objectivity of his reporting for the documentaries."
Although Rivera has reluctantly dropped his plans for the mayor's seat, he tells TV Guide: "I want to affect New York's future. ... And if NBC objects to that, I'll quit."