Blair Hall at Princeton University. Loop Images/ UIG/ Getty Images. Rory Truex, an assistant professor of politics and international affairs at Princeton University, told students not to take his course on Chinese politics if they currently reside in China. Truex told the Daily Princetonian the course covers subjects the Chinese government may consider sensitive and could endanger students. American academics fear for their Chinese students in the wake of China's increasingly bold crackdown on political dissent at home and abroad. Visit Business Insider's homepage for more stories. China's tightening grip on dissent is reaching American universities.Rory Truex, an assistant professor of politics and international affairs at Princeton University, advised students enrolled in his course on Chinese politics not to take the course if they currently reside in China, the Daily Princetonian reported.