Bune began his political career with the now-defunct Christian Democratic Alliance (VLV), which he helped to found in 1998.
In the wake of the civilian coup d'état which deposed the Chaudhry government in 2000, however, the VLV splintered in the realignment that followed, with various members teaming up with the Soqosoqo ni Vakavulewa ni Taukei (SVT) or the newly formed Soqosoqo Duavata ni Lewenivanua (SDL).