Knife-edge? Johnson ahead but polls suggest majority might be tough

Prime Minister Boris Johnson is heading into Britain's election next week with a lead in opinion polls, but some of the surveys also suggest that his chance of winning a parliamentary majority could be too close to call.Four opinion polls published on Saturday put the lead of Johnson's Conservative Party over the main opposition Labour Party at between eight and 15 points, five days before the Dec. 12 national election.At the lowest end of that range, Johnson cannot count on winning the majority