Just got my rejection from State Building, too. I'm anthropology, so even further afield from mainstream political science, which I also figured would hurt my chances :/ Congrats to all who get acceptances!
This was all I could get out of their fellowship assistant (on March 18th):
Thank you for your email. We will be notifying applicants within the next four weeks. All notifications will be sent by April 11. I hope this helps you plan accordingly.