PRESIDENTIAL NEWS OF THE DAY: President and Mrs. Bush spent the weekend at the White House. Yesterday, the President went for a mountain bike ride at the U.S. Secret Service training facility in Beltsville, Maryland. Accompanying him on ride were Health and Human Services Secretary Mike Leavitt and members of the President's Council on Physical Fitness and Sports. Here's an AP piece about the event: President Bush urges nation to exercise By ANN SANNER, Associated Press May 6, 2007 BELTSVILLE, Md. - Just before climbing on his mountain bike Saturday, President Bush urged people to get up off their couches...