Congressman has no grounds to claim "fear."
He threw the first punch and was the only one to get physical.
The only thing the kid could have done different to really make him look bad ... I mean worse, is to have stated name, city and state, and college he attends. However, even without that the Congressman screwed himself big time!
No gun in DC is fine. A closed fist around the barrel of my Surefire would have left him feeling four knuckles against the bridge of his nose when he went for my cameraphone

If you watch the end of the video you will see someone standing off behind the Congressman. However, there is no sign of security anywhere. If there had been security I'm sure they would have been all over these students the moment the Congressman grabbed at the phone.
Once again, good job guys on keeping your cool. I hope this goes national and the Congressman pays the price for assaulting students on the streets of D.C.!