President Donald Trump told Guam's governor Saturday morning that the USA territory is "not going to have a problem" and its people are safe. We are with you 1,000 per cent.
Calvo said that as the governor of Guam and as an American he "has never felt so confident" in his territory's security.
Trump said he was going to speak to Chinese President Xi Jinping on Friday about the deepening crisis with North Korea.
"Don't worry about a thing", Trump said. "All over the world they're talking about Guam and they're talking about you", the clip, about 45 seconds long, showed the President as saying.
Trump joked that after North Korean tensions slacken, Guam will see a "tenfold" increase in tourism.
Former Obama State Department Spokesman John Kirby praised President Donald Trump's national security team Thursday on CNN's "New Day", saying Trump is doing a "commendable job" forming an worldwide coalition to deal with North Korea.
Not yet halfway through his 17-day "working vacation" at a New Jersey golf club, Mr Trump has nonetheless continued to dominate the news agenda by threatening "fire and fury. and power" against Pyongyang over perceived nuclear threats to the US. North Korea recently threatened the Pacific island with a missile attack.
Trump on Friday furthered the rhetoric, saying the USA was "locked and loaded" to deal with the nuclear issue on the Korean peninsula.