In an undated handout photo, a plaque at the Trump National Golf Club in Sterling, Va., commemorates a stretch of the Potomac as the “River of Blood†due to casualties there during the Civil War. Between the 14th hole and the 15th tee of one of the club's two courses, Mr. Trump installed a flagpole on a stone pedestal overlooking the Potomac, to which he affixed a plaque purportedly designating "The River of Blood." "Many great American soldiers, both of the North and South, died at this spot," the inscription reads. "The casualties were so great that the water would...
