CAIRO – Egypt’s Islamist-backed constitution headed toward likely approval in a final round of voting Saturday, but the deep divisions it has opened up threaten to fuel continued turmoil.

Passage is a victory for Islamist President Mohammed Morsi, but a costly one. The bruising battle over the past month stripped away hope that the long-awaited constitution would bring a national consensus on the path Egypt will take after shedding its autocratic ruler Hosni Mubarak nearly two years ago.

Instead, Morsi disillusioned many non-Islamists who had once backed him and has become more reliant on his core support in the Muslim Brotherhood and other Islamists.