For Coaches of Politics, Business Is Booming; Candidates in Crowded Primary Field Want Their Own Personal Trainers
New York City political campaign season this year is bonanza for political consultants of homegrown variety because term limits has created open contests for mayor, public advocate, comptroller, four of city's five borough presidents and 36 of City Council's 51 members; more than 350 people are campaigning to fill those jobs; even consultants themselves say frenzy is unprecedented; photos (L)