Iraq’s lawmakers failed to elect a speaker on Saturday as neither of the two main candidates secured a majority during a tense session of parliament. It is the latest in a series of failed attempts to replace the former head of parliament who was dismissed in November, with political bickering and divisions between key Sunni parties derailing every attempt so far. Saturday’s vote was the closest yet to selecting a new head of the 329-member parliament, with 311 lawmakers showing up for the session and the leading candidate falling just seven votes short. The parliament’s media office announced…