Giuliani has embarked on a remarkable campaign to test the waters for a possible presidential bid. He is touring the country, raising money and hiring staff. He tops the polls for the Republican primary, edging out the early frontrunner, Senator John McCain. When faced with possible Democratic opponents, especially Hillary Clinton, he trounces them. The numbers speak a simple fact: Rudy Giuliani could become the most powerful man in the world. But at the same time Giuliani faces challenges unique among the presidential candidates. In an age of religious conservatism, will the Republicans really choose a man who is pro-choice...