http://www.chicagotribune.com/news/nationworld/politics/ct-mueller-trump-comey-letter-analysis-20170902-story.html
What he didn't do, though, is explicitly admit that he fired Comey because of the Russia investigation. He said it was on his mind at the time that he made the decision, but he didn't connect the dots and say, "I did this because of the Russia probe." As I've argued before, he left himself at least a hint of plausible deniability in the way he phrased it. And when Holt followed up and tried to connect those dots and get Trump to say it more explicitly, Trump deflected.