West Africa's regional bloc ECOWAS must ensure Gambia's President Yahya Jammeh steps down when his mandate ends in January because he lost an election, the bloc's chairwoman, President Ellen Johnson Sirleaf of Liberia, said on Saturday. Johnson Sirleaf did not spell out what measures the bloc would take but they could include sanctions, which could hurt Gambia because ECOWAS member Senegal is the country's only neighbor.
