4 key takeaways from Donald Trump's speech at Davos

US President Donald Trump delivered a special address during the World Economic Forum on Wednesday.

Fabrice COFFRINI / AFP via Getty Images

• At the World Economic Forum in Davos, Trump pressed his case for US control of Greenland.
• Trump defended tariffs as a core tool of leverage.
• He framed global politics as an era of raw economic and military power competition worldwide.

It was a speech that was never going to fly under the radar.

President Donald...