Because when you get an interview between two people that are all but feuding you want questions like "What's your favorite book?"
Most of the general election polls are becoming more favorable towards Trump. Not particularly telling, since there's still the primaries and such going on and some people are bitter about the results. Also looks like nothing on the horizon for the next few weeks, but Clinton is like 90 delegates out from crossing the nominee finish line.
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George Carlin wrote:
I think it’s the duty of the comedian to find out where the line is drawn and cross it deliberately.