President Donald Trump on Saturday reassured Guam it was secure amid mounting regional tensions, vowing that American military forces "stand ready" to safeguard the US Pacific island territory against a belligerent North Korea.
North Korea has announced plans to fire missiles into the sea near the island, a United States territory and key military base in the Western Pacific.
A member of Trump's Republican Party, Calvo insisted during the two men's call that "I have never felt more safe or so confident with you at the helm", according to his office.
"I have to say, Eddie, you're going to become extremely famous".
Trump praised the military, bashed an "obstructionist Congress" and told Calvo how tourism would be boosted for Guam without spending money.
With Guam's safety in the balance, Trump assured the territory's Governor Eddie Calvo: "We are with you 1000 percent, you are safe". And I wanted to call you and say hello.
"If an attack warning is issued, take cover as quickly as you can, under concrete structure or below ground if possible", the sheet adds.
"It's paradise", Calvo said.
Trump touts power of United States nuclear arsenal amid N
Mattis said in a statement that the United States and its allies would win any arms race or conflict with North Korea. Bush was also not successful, Trump said "Obama didn't even want to talk about it".
He then reassured Mr Calvo, who he describes as a "hell of a guy", telling him the USA military is "rock solid".
"You know, they're showing so much, it's such a big story in the news and it just looks like a attractive place", he said.
"They should have had me eight years ago, or at least somebody with my thought process", Trump said.
Referring to an "imminent missile threat", it includes advice like: "Do not look at the flash or fireball - it can blind you". We are rock solid, and we have the best in the world by a factor of five.
Guam residents found themselves practicing air-raid drills in early 2013 after a previous round of threats, in which North Korea specifically named Andersen Air Force Base as a target.
"It just looks like a lovely place", Mr Trump said.
Sen. Lindsey Graham, R-South Carolina, delivered a stern warning to North Korea amid escalating tensions between the U.S. and the rogue state over its nuclear weapons program.
"The U.S. President at [golf] links again let out a load of nonsense about 'fire and fury, ' failing to grasp the ongoing grave situation", a commander of the North Korean army said, as reported by CNN.