President Donald Trump has declared that North Korea still poses an "extraordinary threat'' to the United States. In an executive order Friday, the president extended for one year the so-called ``national emergency'' with respect to the authoritarian, nuclear-armed nation, authorizing economic restrictions against it. While expected, the declaration comes just nine days after Trump tweeted, ``There is no longer a Nuclear Threat from North Korea'' following his summit with North Korean leader Kim Jong Un in Singapore. The order appears to undermine the president's claim. It states that ``the existence and risk of proliferation of weapons-usable fissile material'' and the actions and policies of the North Korean government ``continue to pose an unusual and extraordinary threat to the national security, foreign policy, and economy of the United States.''