Anyone who is in anyway associated with President Trump or his campaign would have to be insane not to plead the 5th if subpoenaed to testify before Congress or questioned by the FBI.
Testifying or even answering questions is now a sure fire way for any Trump associate to get indicted. Just ask George Papadopoulos, Rick Gates, Michael Flynn, Alex van der Zwaan and Roger Stone.
Why would you cooperate with these creeps?
The worst one to talk to is fbi agents unless you get the hillary deal