Coming off a contentious NATO summit and a trip to the U.K. in which he seemed to undercut the government of America's closest ally, President Trump took aim at another Western institution just days before his high-stakes meeting with Russian President Vladimir Putin. In an interview with "CBS Evening News" anchor Jeff Glor in Scotland on Saturday, President Trump named the European Union -- comprising some of America's oldest allies -- when asked to identify his "biggest foe globally right now." "Well, I think we have a lot of foes. I think the European Union is a foe, what they...