Being called a racist is just about the worst thing a person or group can be called. There are reports that black members of Congress had racist epithets hurled at them, and that Barney Frank was called a "faggot".
Frankly, I don't believe it. That's not to say it's impossible for it to have happened, but that there is absolutely zero evidence of it. All we have is the say-so of some folks who have every political motivation to discredit their opponents.
Video was taken from two different angles of the time in question. At no point can anything be heard resembling the accusations made.
I'll accept these accusations when I see some real proof. Until then, video or it didn't happen.
(h/t Doubleplusundead, Midnightbluesays)