A couple of thoughts. First,if you are a red-blooded American patriot, going before Congress is one of the all time great honors. I've done it now less than a half dozen times (this was the first Senate appearance), and all I can tell you is that I am proud of the process, I am proud of the preparation, and I am proud of the people who I sat before--good Americans trying hard to figure out how best to keep the nation safe.
Second: Watch Tom Cotton, junior R Senator from Arkansas. The dude is just flat out sharp. Wicket smaht, a little Abe Lincolnish.
Third: I have to imagine that testifying under more critical conditions (see Clinton, H--Benghazi) is a hell of a lot tougher.