Karl Rove:
Increasingly it appears Mr. Trump lacks the focus or self-discipline to do the basic work required of a president. His chronic impulsiveness is apparently unstoppable and clearly self-defeating. Mr. Trump may have mastered the modes of communication, but not the substance, thereby sabotaging his own agenda.
Peggy Noonan:
The worst part of the testimony is when the president pressed Mr. Comey for his personal loyalty. Presidents don’t lean on FBI chiefs in this way. It is at odds with traditional boundaries, understandings and protocols. It was embarrassing to read. It was the move of a naïf who’s a cynic—I know how the big boys play. Actually it’s not how the big boys play, it’s how someone who learns about government by binge-watching “House of Cards” would play. It was bumptious with the special bumptiousness of those who think themselves savvy.
...
In the end Mr. Comey appears to have done himself little or no harm, but he harmed the president by documenting, again and persuasively, that Mr. Trump does not understand the norms, rules and traditions of his job. As I watched, I wondered how many other appointees, officials and White House staffers are writing themselves memos.