BANJUL, Oct 23 (Reuters): "Togo's leader Faure Gnassingbe should resign immediately and the African Union and West African regional bloc ECOWAS should persuade him to step down if he does not," Gambia's Foreign Minister Ousainou Darboe said. Darboe's comments are an early sign that opinion is shifting against Gnassingbe who took power in 2005 on the death of his father who had ruled since 1967. Togo is enduring a political crisis in which at least 10 people have been killed in protests since August. "I think the African Union and ECOWAS should engage Togo and persuade the president to step down," Darboe told Reuters this weekend, adding that other countries need to step in. "When it goes against accepted norms I don't think it should be treated as an internal affair." Currently, Gambia and Togo are the only countries in the 15-nation ECOWAS bloc without time limits on mandates. ECOWAS sought to make this law ...