White Nationalists on Twitter Sure Do Love Jeff Sessions.

By day, Joe Tien is a math professor at Ohio State University, where he studies the spread of infectious diseases. His research maps how a disease like Ebola jumps from village to village and plots the best way to stop its spread. On his own time, Tien has begun putting his skills in network science toward other subjects, including the connection between white nationalists and American politicians.  Read more.