After entering the House of Representatives in 1995, Georgia Republican Bob Barr acquired a reputation as one of the most conservative members of Congress. It was Barr who in 1996 wrote the Defense of Marriage Act, which said states didn't have to recognize gay marriages performed in other states; it was Barr who protested when he learned the military allowed soldiers to practice Wicca. A former federal prosecutor, a firm social conservative, and a strong supporter of the War on Drugs, Barr doesn't fit most people's image of a civil libertarian. But in his eight years in Congress (he failed...