The Department of Political Science extends offers of admission to approximately thirty applicants each year; twelve to fifteen students matriculate each year. In the 2020-21 academic year, the University will begin implementing a new framework that will guarantee that enrolled PhD students in good academic standing will receive full tuition, a stipend, and paid health insurance premiums for the duration of their program. The department uses criteria such as academic record and scholarly promise for making offers of admission, but need or United States citizenship are not factors. Currently, the annual minimum stipend is $31,000. 

You can read about the new initiative here