WASHINGTON, Nov 20 (Reuters) - President Donald Trump on Monday declared North Korea a state sponsor of terrorism, a designation that allows the United States to impose additional sanctions and risks inflaming tensions over Pyongyang's nuclear weapons and missile programs.
The Republican president, who has traded personal insults with North Korean leader Kim Jong Un but has not ruled out talks, said the Treasury Department will announce more sanctions against North Korea on Tuesday.
The designation came a week after Trump returned from a 12-day, five-nation trip to Asia in which he made containing North Korea's nuclear ambitions a centerpiece of his discussions.
"In addition to threatening the world by nuclear devastation, North Korea has repeatedly supported acts of international terrorism, including assassinations on foreign soil," Trump told reporters at the White House.
"This designation will impose further sanctions and penalties on North Korea and related persons and supports our maximum pressure campaign to isolate the murderous regime."
"It should have happened a long time ago," Trump said.
North Korea is pursuing nuclear weapons and missile programs in defiance of U.N. Security Council sanctions and has made no secret of its plans to develop a nuclear-tipped missile capable of hitting the U.S. mainland. It has fired two missiles over Japan.
South Korea's spy agency said on Monday the North may conduct additional missile tests this year to polish up its long-range missile technology and ramp up the threat against the United States.
Experts say the designation will be largely symbolic, as North Korea is already heavily sanctioned by the United States.
Only three other countries - Iran, Sudan and Syria - have been designated state sponsors of terrorism by the United States.
Some experts, as well as U.S. officials speaking privately, believe North Korea does not meet the criteria for the designation, which requires evidence that a state has "repeatedly provided support for acts of international terrorism."
MOVE COULD BACKFIRE
A U.S. intelligence official who follows developments in North Korea expressed concern that the move could backfire, especially given that the basis for the designation is arguable.
The official, speaking on condition of anonymity, said Kim could respond in a number of ways, including renewing missile or nuclear tests in "a very volatile environment."
The move also could undercut Trump's efforts to solicit greater Chinese cooperation in pressuring North Korea to halt its nuclear and ballistic missile tests, the official said.
In any case, it will do little to open the way for U.S. dialog with North Korea, which China and others have been pushing for.
In February, plans for talks in the United States between former U.S. officials and North Korea were scrapped when the State Department denied a visa for a top envoy from Pyongyang after the murder of Kim's half brother, Kim Jong Nam, in Malaysia.
The assassination also derailed "the first meaningful opportunity" for direct contacts between the two governments, a senior State Department official recently told Reuters.
North Korea was put on the U.S. terrorism sponsor list for the 1987 bombing of a Korean Air flight that killed all 115 people aboard. But the administration of former President George W. Bush, a Republican, removed Pyongyang in 2008 in exchange for progress in denuclearization talks.
Some members of Congress had been pushing for years for North Korea to be put back on the list, but others questioned whether the reclusive regime met the criteria of actively sponsoring international terrorism.
U.S. Representative Ed Royce, the Republican chairman of the House of Representatives Foreign Affairs Committee, applauded the decision, saying that the assassination in Malaysia and the government's other actions justified it.
"This designation ... rightly exposes the Kim regime's utter disregard for human life and is an important step in our efforts to apply maximum diplomatic and financial pressure on Kim Jong Un," Royce said in a statement. (Reporting by Jeff Mason, David Brunnstrom, John Walcott, Patricia Zengerle, Arshad Mohammed and Matt Spetalnick; Writing by Doina Chiacu; Editing by Susan Thomas and James Dalgleish)