My first was uttered by a female (I want to say Cokie Roberts or Margaret Carlson) during the Clinton impeachment (I think):
“Never underestimate the Republicans ability to shoot themselves in the foot while it is in their mouth.”
My all time favorite is by George Will about Howell Heflin:
“Sen. Heflin is a large, loud man who seems to be under the impression that the lungs are a resorvoir of thought.”
Feel free to add your own favorites in the comments section.