Green Party leader Zack Polanski. via Associated PressZack Polanski’s popularity has plummeted amid the row over him sharing an Instagram post suggesting Nigel Farage should be beheaded. His personal approval rating has fallen to minus 28, making him the most unpopular major party leader in the country. More in Common director Luke Tryl said: “After a meteoric rise, Zack Polanski has increasingly been dogged by questions of his judgement in recent months. And Polanski’s personal approval rating has continued to decline, making him the most unpopular major party leader on -28.