In case you were wondering what could make three politicians and two 'journalists' shut up:
"The first twenty minutes of Tuesday's Democratic showdown in Las Vegas passed without a single substantive question, as the NBC moderators busied themselves prodding the soft spots of identity politics. Barack Obama was asked if New Hampshire whites didn't vote for him because he was black. Hillary Clinton was asked how race had become such a big factor in the election. John Edwards was asked, "What is a white male to do?" That was actually the question.
"Then some guy started shouting from the back of the auditorium. "Will you stop all these race-based questions?" he hollered. There was an awkward pause around the big table where everyone sat. The moderators, Tim Russert and Brian Williams, looked guilty and confused."