Democratic incumbent Hillary Rodham Clinton continues to sport a hefty lead over potential 2006 Senate race Republican challenger Jeanine Pirro, a statewide poll reported Wednesday. The Siena College Research Institute Poll had the former first lady leading the Westchester County district attorney, 57 percent to 31 percent. A June poll from the Albany-area institute had Clinton leading Pirro, 59 percent to 29 percent. Pirro has said she will run for statewide office next year, but has not announced whether that will be for Senate or state attorney general, or less likely, governor if Republican incumbent George Pataki doesn't run again....