On Nightline Africa: Nigerian presidential candidate Peter Obi of the opposition Labor Party has expressed happiness with the “rousing welcome” he is receiving at political rallies as the west African nation gears up for the February 25 elections that will witness a replacement of the outgoing President Muhammadu Buhari. Tanzania’s opposition leader, Tundu Lissu who recently returned home after exile in Belgium says he is ready to lead an effort for constitutional reforms in the east African nation. For this and more, stay tuned to VOA's Nightline Africa !