The McCain campaign is slamming Sen. Barack Obama, D-Ill., over a decision to cancel a visit with U.S. troops in Germany. The German magazine Der Spiegel is reporting online that Obama has “cancelled a planned short visit to the Rammstein and Landstuhl U.S. military bases in the southwest German state of Rhineland-Palatinate. The visits were planned for Friday.” “Barack Obama will not be coming to us,” a spokesperson for the U.S. military hospital in Landstuhl told Der Spiegel. “I don't know why.” Obama senior adviser Robert Gibbs told ABC News in a statement, “During his trip as part of the...