For Trump, who previously called climate change "a hoax" and closely followed the advice of Steve Bannon, the headmaster tasked to preserve his populist appeal since the campaign trail, the decision is simply meant to realize a campaign pledge.
More
The words and phrases "leading from behind", "retrenchment" and now "America first" all provide a fuzzy set of conceptualizations so that some may even consider a soft beginning of isolationism in U.S. foreign policy.
More