Tom Coburn was on Charlie Rose earlier this month. He wore a tan suit and a grass green tie:
If ever you gentlemen are on a search for a summer suit that can get longer (and less conspicuous) wear than seersucker, the tan suit is your man. The Senator does the right thing here by choosing a brightly colored tie and a non-white shirt to keep the look summery.
To quibble, I don't care for a button down collar in a business setting, but there are those who disagree with me there, so I'll let it pass (or not, as I'm mentioning it now...). The lapel is a touch too wide too. But overall an excellent look, especially for television, where white is problematic.