That article just shows how low journalism in general has sunk. It isn't the job of the interviewer to argue with the interviewee. It's his job to ask questions, and then let viewers decide what they think of the answers.
One criticism I've seen is that Lauer supposedly "cut-off" Hillary's answers. But he asked Trump 16 questions, and Hillary only 7, so it's pretty clear which candidate made the lengthier responses.
Ridiculous.