Dr. Eugene Gu, this guy obsessively tweets to Trump, has sued him for blocking him on Twitter, harassed his ex, got fired from Vanderbilt University Medical Center, this guy is an unhinged nut job.

https://nextshark.com/dr-eugene-gu-accused-s%E2%80%8Cex%E2%80%8Cu%E2%80%8Cal-as%E2%80%8C%E2%80%8Cs%E2%80%8Ca%E2%80%8Cult-to%E2%80%8Crme%E2%80%8Cntin%E2%80%8Cg-ex-girlfriend-twitter/

http://fortune.com/2017/07/12/donald-trump-twitter-lawsuit-sued-block-unconstitutional/

https://www.tennessean.com/story/money/industries/health-care/2018/06/08/vanderbilt-doctor-eugene-gu-fired-donald-trump/684562002/