President-elect Donald Trump wouldn't rule out military or economic coercion, saying the U.S. needs to stop China. Also a factor: climate change.

In his speech, Trump vowed to lead a government that "expands our territory," referencing his ambitions to acquire Greenland from Denmark and reclaim U.S. control of the Panama Canal. However, the path to achieving these goals remains uncertain, as he is likely to face resistance both domestically and internationally.