Barack Obama is not a Muslim, but a recent survey found that about 10 percent of Americans believe he is. That perception has been fueled by a campaign of rumors and innuendo. It's a campaign that has caused pain in many Muslim communities, including one in Pennsylvania, which holds a key presidential primary Tuesday. Obama had a Muslim stepfather. As a child, he learned about Islam and sometimes went to mosque. Nevertheless, he's a devout Christian. But his middle name, Hussein, has been used by opponents to imply that he's a Muslim. In February, radio host Bill Cunningham spoke in...