take a look at the directions. You also need to discuss how the audience / point of view / bias / purpose of this interview was meant for affects how we use it as a source. The president here has a bias towards viewing the Filipinos from an American-Christian point of view and the interview is for a Christian Magazine and a christian american audience. His purpose in this interview is to explain and justify his actions in acquiring the territory. This affects how we interpret the source and the reliability of the information since it is not a balanced or neutral source. This should be your main focus with evidence and examples.
