Sen. Cory Gardner Cory Scott GardnerHouse approves bill to secure internet-connected federal devices against cyber threats Congress needs to finalize space weather bill as solar storms pose heightened threat Trump courts Florida voters with moratorium on offshore drilling MORE (R-Colo.) is calling on President-elect Donald Trump Donald John TrumpTrump says he doesn't think he could've done more to stop virus spread Conservative activist Lauren Witzke wins GOP Senate primary in Delaware Trump defends claim coronavirus will disappear, citing 'herd mentality' MORE to make North Korea a top priority when he assumes office this month.

In an op-ed published by CNN on Monday, Gardner called on the incoming Trump administration to continue with the "full implementation" and enforcement of the North Korea Sanctions and Policy Enhancement Act.

"In particular, I urge the new administration to utilize the so-called 'secondary sanctions,' which target outside entities, or companies, that help Pyongyang engage in illicit behavior," Gardner wrote.

"Many of these companies are based in the People's Republic of China, and the US must not be afraid to anger Beijing by going after them," he added.

Gardner said "it is imperative that the next administration not only ratchet up pressure on the regime, but that it work with Congress, the international community and our allies in the region to counter North Korean aggression."

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The GOP senator's editorial comes a day after North Korean leader Kim Jong-un said Pyongyang plans to test an intercontinental ballistic missile for the first time, according to The New York Times.

Gardner on Monday slammed "the Obama administration's failed policy of 'strategic patience'" toward North Korea, referencing the country's cyber attacks and number of missile warheads as cause for concern.

He also said it is “impossible to know” if China, an ally of North Korea, complies with U.N. Security Council resolutions on Pyongyang.

“That is why I urge the Trump administration to immediately pursue and implement a full range of economic and criminal unilateral sanctions on any entity that violates North Korea sanctions,” he wrote.

“Our message must be clear: if you do business with Pyongyang, you will face the full wrath of the US economic sanctions regime.”

While Gardner emphasized the importance of sanctions, he also said the U.S. must “reassure our allies” that it will support them diplomatically and militarily should they face North Korean aggression.

“Through a policy of strength, the incoming Trump administration should seize the immediate opportunity to communicate with action to Kim Jong Un as well as our allies that the United States remains committed to standing up to tyrants and ensuring peace and stability around the globe,” he wrote.