On "Fox & Friends" this morning, Judge Jeanine Pirro said she likes Trump's strong rhetoric, since he's dealing with a "bully" and a "lunatic" in the North Korean dictator.
The relationship between the two presidents is "an extremely close one", the administration added, calling Trump's upcoming visit to China "a very historic event".
In their phone call, Trump and Xi "agreed North Korea must stop its provocative and escalatory behavior", the White House said in a statement, and reiterated their mutual commitment to denuclearize the Korean peninsula.
Mr Xi also stressed China and the United States shared "common interests" over denuclearisation and maintaining peace on the Korean peninsula.
Alluding to the threats against Guam, Mr Trump said if North Korea took any steps to even think about an attack, it would have reason to be nervous.
He also said that North Korea would be in "big, big trouble" if anything happened to Guam.
But in a pointed warning that China may not back its old Korean War ally, a state-run newspaper said Friday that Beijing should not intervene on Pyongyang's side if it triggered a conflict. DPRK stands for North Korea's official name, the Democratic People's Republic of Korea.
New United Nations sanctions condemning the North's rapidly developing nuclear program drew fresh ire and threats from Pyongyang.
Trump on Friday also retweeted images of U.S. B-1 bombers stationed in Guam.
The North then came out with a threat to lob four intermediate-range "Hwasong-12" missiles near Guam, a tiny USA territory some 3,200 kilometers (2,000 miles) from Pyongyang. Trump's approval rating has dipped to historic lows, and Republicans and Democrats disagree sharply on whether they think the president is capable of dealing with North Korea.
An article in The New York Times lays out theoretical USA and Japanese defenses-while Washington and Japan have the tools to intercept the missile, there are many variables involved in shooting down a missile warhead streaking over the Pacific at thousands of miles an hour.
Xi Jinping has urged Donald Trump to "avoid remarks and actions that escalate tensions on the Korean peninsula" following the US President's repeated outspoken statements on the nuclear crisis. State-run media ensures that the population gets the North Korean side of the story, but doesn't convey any sense of global concern about the situation.
USA officials say they will be going ahead with long-scheduled military exercises with South Korea.
"Pyongyang understands that if it launches a nuclear missile this would risk provoking nuclear war". North Korea's escalating missile and nuclear tests appear to have given it the capability to strike America with a nuclear-armed missile.
This is a stark contrast to Trump's earlier Friday comments, which claimed that the US was "locked and loaded" for a retaliatory act against North Korea should they attack Guam as they'd claimed to have planned. North Korean state media reports suggest Kim Jong Un could potentially sign off on the plan at about that same time.
Guam has about 7,000 U.S. troops with nearly a third of the land controlled by the USA military. The U.S. devastated most of North Korea's cities and infrastructure with a massive bombing campaign during the 1950-53 Korean War.
Russian Federation and Germany have also urged both sides to tone down the rhetoric.
"It would be very hard to eliminate that threat before the artillery fire could create a lot of damage on the southern side", said David Shear, who served as the senior USA defence official for east Asia under former President Barack Obama.