(CNN) -- Pres. Donald trump: "What they've been doing and what they've been getting away with is a tragedy and cannot be allowed."
President Trump meeting with top national security advisers Thursday, as North Korea steps up threats.
State media there says a plan to fire four missiles near the US island territory of Guam, home to two US military bases, could be ready for review by leader Kim Jong Un in days.
As of Thursday morning, US defense officials said there were no indications of any imminent launch activity by North Korea.
But some worry about president Trump's language versus the unpredictable Kim Jong Un.
After President Trump promised fire and fury Tuesday, Secretary of State Rex Tillerson took a calmer approach, leading some to accuse The White House of mixed messaging.
The president's own party is split on his approach. Republican Congressman Lee Zeldin of New York, saying he's not comfortable with it.
Rep. Lee Zeldin (R-NY): "I don't believe that we should actually be using military action against North Korea for what is just standard practice by North Korea."
On twitter, Senator Marco Rubio of Florida, saying, the attacks on trump are "Ridiculous." Adding critics "Act as if North Korea would act different if he used nicer words."
Meanwhile, at the center of a war of words, Guam remains vigilant but calm.
Gov. Eddie Baza Calvo (R-Guam): "I feel very confident not only in those forces defending Guam within the terrestrial land of Guam, but also those at sea."