It's unclear how the issue of ownership of the Panama Canal became a talking point for President-elect Donald Trump this week, but the question has a long political history.

President-elect Donald Trump's comments about annexing Canada and taking on Greenland and the Panama Canal are reverberating across the world. On social media, Trump also denounced President Biden's decision to commute the sentences for dozens of federal inmates on death row.

Trump again having designs on Greenland comes after the president-elect suggested over the weekend that the U.S. could retake control of the Panama Canal if something isn't done to ease rising shipping costs required for using the waterway linking the Atlantic and Pacific oceans.