Strategist Split to Roil City Politics

One of New York's top political-consulting partnerships — they've repped Mike Bloomberg, Christine Quinn, and Joe Lieberman, plus unions, other Dems, and developers including Forest City Ratner — is splitting up. Knickerbocker SKD — the highly influential pairing of wunderkind strategists Josh Isay, who made his name managing Chuck Schumer's 1998 defeat of Al D'Amato, and Micah Lasher, who's been a strategist for dozens of campaigns, including Manhattan Borough President Scott Stringer's 2005 victory over eight other Democratic contenders for the beep job — now faces an uncertain future as Lasher plans to leave the firm, according to sources. Lasher feels it's the right time to depart, the sources say, and he also has his eye on Gale Brewer's Upper West Side City Council seat. (Brewer will have to leave her post in 2009 because of term limits.) Isay will continue running the firm with other strategists; it's unclear how the split will affect top clients like Council Speaker Quinn, who is likely running for mayor, and Stringer, said to be eying the comptroller position. —Geoffrey Gray