I might also point H-AmStdy readers to a recent essay in the ISSF Policy Series over at H-Diplo.
In "The Appeal of ‘America First’,”John Thompson predicts that "we are about to witness the most profound change in the structure of world politics since 1945." A bold statement to be sure. So far Trump's domestic and migration policies have occupied a significant amount of energy and organizing. To this, Thompson's analysis adds some preliminary thoughts on the geopolitical shifts that we might also expect.