On January 20, the United States transitions from the presidency of Joseph R. Biden to Donald Trump. This represents only the second time in history that the US president will have served a second non-consecutive term. President-elect Trump has proposed changes in a variety of areas of policy, including many concerning relationships with other countries. Of particular importance are various policies related to the two countries bordering the US - Canada and Mexico - with proposals for increased border security, deportation of unauthorized migrants, and significant tariffs. European nations may also be significantly impacted by increased tariffs as well as changes in support for defense an...