45 CFR §2400.41

1. (a)Fellows may pursue a master's degree in history or political science (including government or politics), the degree of Master of Arts in Teaching in history or political science (including government or politics), or a related master's degree in education that permits a concentration in American history, American government, social studies, or political science. Graduate degrees under which study is excluded from fellowship support are indicated in § 2400.63.
2. (b)A master's degree pursued under a James Madison Fellowship may entail either one or two years or their equivalent of study, according to the requirements of the university at which a Fellow is enrolled.