Vice President JD Vance has become President Donald Trump's top surrogate in the US effort to annex Greenland.
JIM WATSON/POOL/AFP via Getty Images
- Donald Trump says he wants to annex Greenland.
- JD Vance last week visited a US-controlled base in Greenland, where he chided Denmark.
- Vast, untapped natural resources in Greenland are at stake.
Danish officials have repeatedly told President Donald Trump that Greenland is "not for sale."
Trump doesn't seem to care.