Tunisia's president says IS, Syrian regime must go"The issue of the Syrian regime is of utmost concern, as it is the region’s most criminal regime, and we should want nothing from it except its downfall. Therefore, we must support any efforts leading to this end. In any case, today we face a choice between the plague and smallpox. But we must choose neither IS nor the Syrian regime; both must go, for the sake of a pluralistic democratic system."