Can Hillary overcome the shrillness of her voice?  Can Obama demonstrate  substance worthy of his own charismatic voice? 

I pondered these questions as I spent much of today listening to a speech which Hillary Clinton delivered last October to the Council on Foreign Relations, comparing it with the latest episode of Barack Obama’s weekly podcast.  What I thought would be a simple win for Obama turned out to be a little more complicated.  If all goes as expected, this will be a most interesting contest.