Complex sentence: The desired goal of the military government of Olusegun Obasanjo to build national political parties led to a gradual weakening of ethnic politics in the second republic and the emergence of class as a political matter to be exploited or used for political gain.
Split into simpler sentences: The desired goal of the military government of Olusegun Obasanjo to build national political parties led to a gradual weakening of ethnic politics in the second republic. However, an emerging force was beginning to shape the political debate, class became a political matter to be exploited or used for political gain.