Answer
Yahya Jammeh, the long-time incumbent, was defeated by Adama Barrow in the 2016 Gambian presidential election. Jammeh had ruled Gambia for 22 years, but his authoritarian regime and human rights abuses led to widespread dissatisfaction among the population. Barrow, a businessman and political newcomer, campaigned on a platform of change and democracy, and his victory was seen as a major upset.