A leading organizer of a political action committee created to derail Senator Hillary Rodham Clinton’s presidential prospects is also a major contributor to Rudolph W. Giuliani, according to campaign finance reports. The organizer, Richard Collins, a principal figure behind the group Stop Her Now, has given $10,000 to Mr. Giuliani’s political action committee Solutions America over the last two years, according to campaign finance disclosure documents.On a Web site posted Monday, the Stop Her Now group says that its goals include attempting “to shed light on the real Hillary Clinton and the danger she and her ideas pose for America.”Mrs....