WASHINGTON -- A fixture since President Harry S. Truman signed a bill proclaiming a National Day of Prayer 58 years ago, 2010 could be the last time the event is observed if the White House fails in an appeal against a court ruling that it violates the ban on government-backed religion. Wisconsin-based U.S. District Court Judge Barbara Crabb ruled April 15 in favor of the Freedom From Religion Foundation in a suit brought against President Barack Obama. She ruled that the federal law that designates a National Day of Prayer and requires an annual presidential proclamation of the National Day...