Ted Lieu,Dem-Ca. says this shows "consciousness of guilt" by Trump--i.e. he knew he was about to commit a crime. It also showed the same as M.O. that he used when he asked Sessions and Pence to leave the room with Comey.
Lieu is a former prosecutor and he says we are seeing the flagrant abuse of law. His solution is the Special Counsel.
Trump supporters are arguing he did know any better but they all quote Trump on Clinton meeting Loretta Lynch as interfering with an investigation.