GREENSBORO, N.C. - Before Sen. Barack Obama took the stage here Wednesday, the crowd was led in prayer and the Pledge of Allegiance. And as the Illinois Democrat ended his speech, he offered a "God bless America." As Obama returned to the campaign trail after a brief respite, news and questions about his controversial former Chicago pastor continued to circulate, while the activities before his appearance seemed to try to reinforce that he is a Christian and a patriot. An audience in Indiana had also been led in prayer on the Saturday after the flap over the Rev. Jeremiah Wright...