A candidate in Iran’s presidential election announced he was dropping out of the race in an effort to unite support among hardline voters headed to the polls on Friday. The departure of Amirhossein Ghazizadeh Hashemi, an arch-conservative politician, leaves five contenders in the election to replace Ebrahim Raisi, who died in a helicopter crash in May. Ghazizadeh Hashemi was one of Raisi’s vice presidents and is chairman of the Foundation of Martyrs and Veterans Affairs. He belongs to the Front of Islamic Revolution Stability, a political faction loyal to the Islamic Republic’s hardline leader…