Tunisians vote Monday on a constitution seen as a referendum on President Kais Saied, whose charter would give his office nearly unchecked powers in a break with the country's post-2011 democratic trend.Voting runs from 6:00 am (0500 GMT) to 10:00 pm at some 11,000 polling stations across the North African country.Around 9.3 million out of Tunisia's 12 million people -- civilians aged over 18 -- have opted in or been automatically registered to vote, according to the ISIE electoral commission.