I watched the testimony in real time and thought that McCain was having a mini-stroke as he was incoherent and didn’t understand what Director Comey was saying — McCain seemed totally confused.
My other thought was that he had taken some kind of medication that affected his cognitive abilities. He’s usually very eloquent and to-the-point when he speaks. He indeed conflated two different investigations and responded as though they were but one. Frankly, it was sad to watch.