Usha Vance will be joined by Energy Secretary Chris Wright and national security adviser Mike Waltz. Vance, who is taking one of her two sons, will visit historical sites, learn about Greenlandic heritage and attend a national dogsled race. The officials will embark on the trip as Trump sharpens his proposal to take over Greenland, a mineral-rich island that houses a US military base in a region of growing geopolitical importance.