Which social science would be interested in the actions taken by elected officials both during and in the aftermath of the earthquake in haiti?

Answer: Political Science.

Political science is the social science that deals with types of governance, political activity, political behaviour and political ideas. It studies both the theory and the practice of how power is distributed in the world, and how people use it.

In this case, the object of study is the behaviour of politicians, which is one of political science's major topics of study.