Chess Clocks in Presidential Debates?

U.S. presidential candidates who know how to play chess will have an advantage if Seth Godin has his way.  The marketing guru has proposed that the presidential debates be modified so that each candidate has more control over the time he spends answering questions.  “Why not use a chess clock style timing device,” Godin writes in his blog, “so that each candidate can be free to answer a question for as long as she likes, but each candidate enters the debate with exactly the same amount of time to allocate?”