The new White House report that issued a dire warning about the nation’s changing climate comes on the heels of another study that illustrated how those changes could leave the world's largest coastal cities submerged in water. On Tuesday, President Obama stressed in an interview with TODAY’s Al Roker that climate change is already an issue costing the nation in numerous ways. "This is a problem that is affecting Americans right now," he said after the release of the new National Climate Assessment report, a comprehensive review of climate change and its impact on the country. "Whether it means increased...