I find the results of this study rather interesting. I tend to think politicians in general are not as well spoken as their predecessors. They're still speaking over the heads of the average American, so maybe this isn't important? Interestingly enough, Dick Lugar is ranked near the top as a 13.4 grade level speaker.
Is Congress getting dumber, or just more plainspoken? - Sunlight Foundation
Is Congress getting dumber, or just more plainspoken? - Sunlight Foundation