President Donald Trump and the NFL were supposed to be friends.Recall the White House lawn on a sunny April afternoon when Trump welcomed the Super Bowl champion New England Patriots; he and owner Robert Kraft fawned over each other like high school sweethearts. “A very good friend of mine for over 25 years, a man who is as mentally tough and hardworking as anybody I know, launched a campaign for the presidency against 16 career politicians,” Kraft crowed.