New York ? After two years of playing coy about his presidential ambitions, Mayor Michael Bloomberg declared in a newspaper editorial Wednesday that he will not run for president but might support the candidate who “takes an independent, nonpartisan approach.”

The 66-year-old billionaire businessman, who aides had said was prepared to spend $1 billion to run as an independent, wrote in an editorial on The New York Times’ Web site that he will work to “steer the national conversation away from partisanship and toward unity; away from ideology and toward common sense; away from sound bites and toward substance.”