It is illegal to intimidate witnesses against you. It is particularly bad for the President to way in on any court case, but especially his own. The President of the United States threatened a witness in a case against him. We know through Michael Cohen’s lawyer that Michael is now worried about his father-in-law and re-evaluating the situation.
Verified: Trump did this in public. There is no dispute. The only question is whether Mueller or anyone will bother to prosecute because of all the other crimes. Wait and see time.