he said as much on departure for puerto rico yesterday here at the white house. the president ran as a strong supporter of gun rights. and cnn has been told he's being advised by top administration officials to steer clear of the issue, harkening back to what we heard on capitol hill many times after these mass casualty shooting events that now is not the time and all the facts need to be entered before entering into a discussion on second amendment rights. >> thank you, joe, for all of that reporting. now to the russia investigation. cnn has exclusive new details about those russian-linked facebook ads during the 2016 presidential campaign. some targeted swing states key to president trump defeating hillary clinton. cnn's manu raju has all the details for us. what did you learn?