Washington - The US Vice President, Mr Al Gore, went on the offensive yesterday against his US Democratic presidential rival, Mr Bill Bradley, accusing him of supporting Reaganera cuts in schools and health care and challenging him to biweekly debates. Mr Gore also said he would not fire his campaign chief, Mr Tony Coelho, despite reports that Mr Coelho approved questionable payments to contractors as head of the US pavilion at last year's World Exposition in Portugal.