CLINTON SAYS HE'S AT HELM OF BIAS FIGHT.(MAIN)

Byline: SONYA ROSS Associated Press

WASHINGTON -- With his national dialogue on race barely under way, President Clinton was defending the idea Sunday as a good use of the presidency, ``still an effective bully pulpit'' for resolving conflict among the races.

A poll released Sunday might suggest otherwise. It said more than half the Americans consider racism an intractable dilemma that no president can control.

In a flurry of television interviews, Clinton sought to dispel his critics' argument that the campaign he unveiled Saturday in San Diego, which revolves around having Americans speak out before a presidential advisory board, will be a lot of …