Interview he gave to CBS news just confirms what a twit he is. He believes the US is a business as and only wants to get stuff if it benefits him. Calling the EU a foe and calling the EU and China competitors shows he can't realistically run a country.
You are meant to work with other countries to help each other, not just yourself.
Donald Trump: European Union is a foe on trade -
http://www.bbc.co.uk/news/world-us-canada-44837311