A passage from Part 6, chapter 18 of Tolstoy’s War and Peace reminds me of more than one person I met during my years in Washington:
The visitor was Bitski, who served on various committees, frequented all the societies in Petersburg, and a passionate devotee of the new ideas and of Speranski, and a diligent Petersburg newsmonger—one of those men who choose their opinions like their clothes according to the fashion, but who for that very reason appear to be the warmest partisans.