Labour’s landslide victory in Thursday’s U.K. election gives the party a “wide but thin” mandate, says Guardian columnist Nesrine Malik, who says the new government of Prime Minister Keir Starmer has to work hard to solidify its gains “if it’s not going to be a temporary win.” She also discusses her new piece, “Pro-Palestine votes aren’t 'sectarian'. Dismissing them would be a dangerous mistake for Labour.”