U.S. officials have warned that "all options are on the table" in dealing with the North Korean threat but have so far relied on China to rein in its unpredictable ally.
Some senators planning to attend said they would welcome hearing from the commander in chief directly about North Korea, which analysts believe is preparing for a sixth nuclear test. North Korea is a big world problem, and its a problem we have to finally solve. Voice of America reported there were "concerns the communist state will celebrate the holiday with a nuclear test or an intercontinental ballistic missile".
The briefing, involving 100 senators as well as Secretary of State Rex Tillerson and Defence Secretary James Mattis, is being held on Wednesday.
Donald Trump isn't going to let go of Sean Spicer, the White House press secretary, despite the fact that Spicer has made multiple public mistakes.
Officials said the briefing would take place in the auditorium of the Eisenhower Executive Office Building, which can be adapted for such an event.More news: UID for cows: Opposition chides Centre's "mis-focused" policy
Republican Senator Lindsey Graham told Reuters the administration should be telling senators it has a "red line", if it has one.
Among those present was Charlie Spiering, White House correspondent for Breitbart News, who tweeted that Trump spoke for more than a half an hour.
The meeting was set for one day after a North Korean holiday on Tuesday marking the 85th anniversary of the founding of its army.
"I think the President is sending a signal that this is important", Cornyn said.
North Korea on Sunday threatened to sink an American aircraft carrier, which had begun joint drills with two Japanese destroyers in the western Pacific Ocean, in a demonstration of its military might.More news: N'Golo Kante: Why Chelsea midfielder won PFA Player of the Year
"It is a very positive sign, the level and engagement that China has enacted", Spicer told reporters when asked about the simmering tension in the Korean peninsula amid fears that the North may test another nuclear weapon triggering a military conflict with the US.
North Korea's state-run newspaper the Rodong Sinmun declared the country's armed forces were ready to show their strength by sinking the carrier "with a single strike".
Trump, in the phone call with Xi, "criticized North Korea's continued belligerence and emphasized Pyongyang's actions are destabilizing the Korean Peninsula", according to a White House readout issued Monday.
Two former US officials, intelligence director James Clapper and Deputy Attorney General Sally Yates, will testify next month in a Senate investigation into alleged Russian meddling in the 2016 USA presidential election, the Senate Judiciary Committee says.
United States ambassador to the UN Nikki Haley said the USA is not seeking a fight with North Korea and would not attack "unless he (North Korean leader Kim Jong-un) gives us reason to do something".More news: Messi's 500th Barca goal sinks Real Madrid in thriller
The latest development comes after Nikki Haley, U.S. ambassador to the United Nations, spoke on TV on Monday about the Trump administration's "red lines" in the face-off with North Korea. Normally a press secretary tries their best not to ever directly lie to the press, lest they lose credibility with the press. He feels it. That's why he's responding this way.