Trump doesn’t Sue. He threatens to sue.
But he does get sued.
Well, sometimes he sues. But usually it is just to intimidate and to punish by lawyer costs.
Trump filed a $500 million lawsuit against Univision, claiming that political interference from one of Univision’s owners, prominent Democratic fundraiser Haim Saban, drove the company’s decision to back out of the contract. According to the court filing, Univision’s five-year rights deal was valued at $13.5 million.
http://variety.com/2016/tv/news/donald-trump-univision-settle-miss-universe-lawsuit-1201703508/