Listen/watch this from Rachel Maddow. It takes a while to unfold.
I do not want to have a Secretary of State who would allow this to happen in Chad. He had/has the power to make Chad a better place, but instead he does not care as long as Exxon/Mobile and their shareholders/execs take that money. Chad has sunk into being one of the poorest nations earth.
Also read this more neutral NPR article.
Yes Condi and Gates have supported him but they are consultants for Exxon.