Sat Mar 3, 3:14 PM ET WASHINGTON (AFP) - Former New York Mayor Rudy Giuliani has taken a wide lead over his rivals for the Republican presidential nomination but many voters remain unaware of his stand on key issues, a new poll showed Saturday. Giuliani is favored by an impressive 59 percent of Republican voters over his main rival, Senator John McCain (news, bio, voting record), who trails with 34 percent support, according to the latest Newsweek poll. Giuliani has surged ahead since a January 25 Newsweek poll, when he had a narrow lead of four points over McCain that...