Tunisians shout slogans during a demonstration aganist what they call 'an election fraud' in front of the press center in Tunis, October 25, 2011.

A demonstrator holds a banner during a protest against the Islamist Ennahda movement in Tunis October 25, 2011. Tunisia's moderate Islamist party was preparing to lead a coalition government Tuesday after its election win sent a message to the region that once-banned Islamists are challenging for power after the "Arab Spring." With election officials still counting ballots from Sunday's vote -- the first since the uprisings which began in Tunisia and spread through the region -- the Ennahda party said its own tally showed it won and several of its biggest rivals conceded defeat.