Leaders of Nigeria, Sierra Leone and Liberia are due to visit Gambian President Yahya Jammeh on Wednesday in a second attempt to press him to hand over power. An ECOWAS delegation led by Liberian President Ellen Johnson Sirleaf visited Gambia in December but failed to persuade Jammeh to step down. The West African bloc has said that a military intervention to force Jammeh out was conceivable. On Monday President Muhammadu Buhari and other West African leaders met in Abuja, in a bid to resolve the political impasse in Gambia. Nigeria’s Foreign Minister says the regional bloc is still exploring every option.