WASHINGTON - President Bush (news - web sites) retains an advantage with voters on such qualities as decisiveness and strength of leadership despite the Democrats' effort to promote John Kerry (news - web sites) as a strong leader, a poll this week finds. "The Kerry campaign spent $80 million to $100 million on advertising and then held the convention in July, all to showcase John Kerry as a strong leader," said Bush campaign strategist Matthew Dowd. "When the polls showed very little movement, they said the goal was to change the public perception of his attributes." When asked which candidate...