Usha Vance, the wife of U.S. Vice President JD Vance, will travel to Greenland on March 27 as President Donald Trump clings to the idea of a U.S. annexation of the strategic, semi-autonomous Danish territory. She will visit Greenland with a U.S. delegation to tour historical sites, learn about the territory's heritage and attend the national dogsled race, the White House said in a statement. The delegation will return to the U.S. on March 29.