The lady dunks. Washington, D.C., May 3. Rep. Caroline O'Day, Representative at large from New York, today joined in the fun at the House restaurant. The occasion was a doughnut dunking contest, sponsored by the Mayflower Doughnut Corp. Rep. O'Day demonstrated such a light touch and delicacy of manner that she was declared the runner-up, while Rep. Jennings Randolph of West Virginia took the cup because he showed the right robustness and nonchalance