Lebanon's parliament speaker is expected to postpone for the third time a special session to elect a president, officials said on Tuesday, as the deadline to replace the current pro-Syrian head of state nears. "We are expecting the session to be postponed although we are keeping the door open for an election to take place November 12," said Antoine Nasrallah, a spokesman for candidate Michel Aoun, who heads the opposition Change and Reform bloc in parliament.He was referring to next Monday's parliament session called by speaker Nabih Berri to replace Emile Lahoud, whose mandate expires November 24.