You have enough reach schools on your list if you decide to include NU and Georgetown to the three ivies you mentioned. Typically govt/international relations students look at George Washington, American in DC, NYU, BU for matches, you may want to consider Michigan (that will be reach for OOS, but your GC should have info on how your high school does wrt UM). Assuming OSU is your safety.
@theloniusmonk Yeah, I probably won’t apply to all three Ivies, since I plan to apply to UF, Emory, Villanova, and WashU. I am not sure what GPA would be good for Tufts? Not many kids apply from my school, so there is like one data point for an accepted student.