“The CIA operative and FBI informant used to gather information on the 2016 Trump campaign has, for weeks, been falsely depicted as a sensitive intelligence asset rather than what he actually is: a long-time CIA operative with extensive links to the Bush family who was responsible for a dirty and likely illegal spying operation in the 1980 presidential election.”
Read more: https://theintercept.com/2018/05/19/the-fbi-informant-who-monitored-the-trump-campaign-stefan-halper-oversaw-a-cia-spying-operation-in-the-1980-presidential-election/