"I vowed that if my initiative did not succeed, I would resign and I have done so, " Mr Jebali told a news conference after meeting President Moncef Marzouki.
"I think that it's clear that Mr Schwarzenegger's campaign strategists have concluded that they can get him elected without having to expose him to the voters or to reporters, I don't know if they will succeed in that but I don't think they are doing anybody - including their candidate - any favours, " Mr Cannon says.