AGE: 67
OCCUPATION: Mayor of New York City
PREVIOUS APPEARANCES ON THE TIME 100: 2
PRO: He lobbied for — and received — an amendment to New York City's term-limits provision that would allow him to run for a third time in 2009. If he wins, he'll keep working on the environmental and health reforms that have defined his administration.
CON: New York City's financial sector has taken a huge hit, and the city's subway system and film-production industry are in dire straits. Plus, his term-limits movement struck many as a blatant power-grab.