While seeing relatives in Port Limon, Costa Rica in 1999, I stepped into my great aunt's house after a late-morning stroll. "What's for lunch?" I asked. "Liver and onions," she triumphantly announced. Trying to offend neither my dad's sister nor my visiting grandmother, I sat down and ate an oily serving of fried, seasoned organ meat. I soon smilingly accepted a second helping. Calmly, I ignored the bellyaching of my inner food critic who feared that something so greasy could not be so healthy. The GOP Congress seems equally resigned to grit its collective teeth and swallow a massive Medicare...