Libya’s parliament, the House of Representatives (HOR) is poised to vote on the terms of a planned referendum on constitutional changes, with a timetable in place for elections by the end of the year. But after another round of damaging politicking in recent weeks, there is little chance that the plans will keep to schedule.

The timetable to hold elections by 10 December is likely to slip until at least the spring, sources close to the process tell MEES. The timetable, set only three...