I love Gail Collins' writing, and a splendid example of it is from her most recent New York Times column:
"One thing that never changes in Washington is the difference in metabolism between the House and Senate. Have you ever watched pet-rehabilitation shows like “The Dog Whisperer”? The House is the deranged Pomeranian that yelps and throws itself against the window and tears up the upholstery 24/7. The Senate, meanwhile, is like a narcoleptic Great Dane you can hardly rouse for dinner."