Right before the election we were in no less than five military entanglements, but based on relative news coverage from the Bush to Obama Administrations, the public had little reason to know about more than one or two of them. The Presidential debates hardly covered them, either. Hillary Clinton didn’t want to talk about foreign policy as that opened questions to her tenure as Secretary of State, and perhaps her husband’s Administration. Trump did not care to talk about them because he sought to appeal to his base which was more isolationist.
A little time passes, and Trump’s positions seem unprecedented because journalists have short memories and don’t do the research. Ben Rhodes could have told us that. (Actually, he did.)