Trump’s record with suing others is not very good. Those Trump sues or is sued by have a great record. Trump recently had to pay almost $800,000 to a womans attorney that Trump claimed defamed her.
He recently sued Univision for not carrying Miss America after they signed a contract to do so. Trump sued for $500-million and there was an undisclosed settlement.
The Univision settlement probably paid for his Presidential campaign.
Trump, Univision settle beauty pageant lawsuit
http://www.usatoday.com/story/money/2016/02/11/trump-univision-settle-beauty-pageant-lawsuit/80238188/