Discussion on campaign trail turns to foreign policy , national security , terrorism . Candidates trying to portray themselves as the one with the most experience . Musharraf says he would call on Richardson to step down , McCain disagrees . Thompson challenges Musharraf 's foreign policy experience .
Discussion on campaign trail turns to foreign policy , national security , terrorism . Candidates trying to portray themselves as the one with the most experience . Richardson says he would call on Musharraf to step down , Thompson disagrees . McCain challenges Giuliani 's foreign policy experience .