Clyburn owes those protesters some more specific allegations. I spent a few hours with them today and saw a very different picture. There are nuts and racists in a lot of crowds, but the signs and their conversations and their chants today have largely (actually, I saw zero racism and exactly one “long form” birth certificate sign) covered these things up extremely well if Clyburn has their number.

UPDATE: Talking Points Memo reports:

It seems that ugly crowd of protestors harassing members of Congress in the Capitol complex this afternoon got even uglier than we thought. As noted earlier, in addition to menacing behavior toward multiple members of Congress, one protestor called Rep. Barney Frank a “faggot”, a taunt greeted by laughter from fellow protestors.
We’re now getting reports that other protestors yelled “nigger” at Rep. John Lewis (D-GA).

That’s shameful, uncivil, and wrong. And in my experience there unrepresentative.