Frontrunners Béji Caïd Essebsi, a former Ben Ali official, and Moncef Marzouki, incumbent head of state, go head to headTunisians went to the polls on Sunday to pick their first directly elected president, the final step in the North African state’s transition to full democracy following a 2011 revolution that ousted long-time ruler Zine al-Abidine Ben Ali.More than three years since overthrowing Zine al-Abidine Ben Ali Ben Ali’s one-party rule, Tunisia has adopted a new constitution, and rival secularists and Islamist parties have largely avoided turmoil that has recently plagued other Arab states.