from The World According to Trump by Charles Krauthammer in National Review:
Both the Left and the Right have a long history of advocating American retreat and retrenchment. The difference is that liberals want to come home because they think we are not good enough for the world. Conservatives want to wash their hands of the world because they think the world is not good enough for us.
Read more at: http://www.nationalreview.com/article/434717/donald-trump-foreign-policy-america-first