Americans have the warmest feelings about former New York City Mayor Rudy Giuliani, Republican Sen. John McCain and Democratic Sen. Barack Obama, according to a poll released Monday that scores the popularity of national leaders. The Quinnipiac University's "thermometer reading," taken the week after the Nov. 7 election, asked voters to rate their feelings for 20 leaders on a scale of 0 to 100. Giuliani, a Republican weighing a presidential bid in 2008, scored the highest at 64.2. Obama and McCain, who are also considering a 2008 campaign, finished next at 58.8 and 57.7. President Bush was 15th out of...