*Gambian opposition supporters have held a mammoth rally days to the country's presidential election on December 1.*
Among calls for a change, they are banking hopes on a failed President Yahya Jammeh presidency to get them power.
One other candidate is standing with seven previously contesting, others coming together to support the main opposition the United Democratic Party's Adam Barrow to compete against Jammeh.
Jammeh is seeking a fifth term in office, having come to power through a coup…