McCain just claimed Obama wants to raise taxes. When Obama asked for time to respond, Brokaw denied him the time, pointing to "the rules."
Then, not 20 seconds later, Brokaw announced that "since the rules are a little loose here," he was going to add his own question to the mix.
So, Tom Brokaw strictly applies the rules when it means denying Obama the chance to respond to a misleading claim about his plans. But then Brokaw announces that the rules are "a little loose" when he wants to ask a question.
No wonder the McCain campaign picked Brokaw to moderate the debate.