McCabe’s sole reason for opening an obstruction investigation on the President was the Holt interview in which Trump said he knew the investigation would continue and even lengthen but he had to fire Comey because he was not the right man for the job, which 3 IG Reports Prove. 
Not only that, we know from the FISA Report that McCabe’s handpicked team knew their case fell apart in Jan 2017 when the primary sub source debunked it. Therefore it goes beyond all logic how McCabe would make the leap of opening a case on the POTUS just on a TV Interview....
Unless McCabe held a deep animosity towards the President and was seeking Revenge. This is why AG Barr said he instructed Durham to focus on after the election. These inexplicable actions coupled with the case falling apart in Jan 2017 prove a soft coup attempt in the POTUS.
