White House national security aide Sebastian Gorka Sebastian Lukacs GorkaSunday shows preview: Trump, lawmakers weigh in on COVID-19, masks and school reopenings amid virus surge Trump taps Gorka for national security advisory board Sunday shows preview: Coronavirus poses questions about school safety; Trump commutes Roger Stone sentence MORE on Wednesday said President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE’s most recent tweets about the strength of the U.S. nuclear arsenal are a warning to North Korea not to test the commander in chief.

“He’s saying 'don’t test America and don’t test Donald J. Trump,' ” Gorka told “Fox & Friends.”

Trump earlier Wednesday had tweeted that his "first order" as president "was to renovate and modernize our nuclear arsenal."

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"It is now far stronger and more powerful than ever before. Hopefully we will never have to use this power, but there will never be a time that we are not the most powerful nation in the world!” the president tweeted.

Trump's first executive order, signed the day of his inauguration, was focused on repealing ObamaCare. The president's latest tweets appear to be a reference to the nuclear posture review, which is ongoing.

Gorka described the tweets as a warning to Pyongyang, which said on Tuesday that it is considering strikes on an American territory following Trump’s vow to unleash “fire, fury and frankly power” on North Korea if it continues to threaten the United States.

“We are not just a superpower. We were a superpower. We are now a hyperpower. Nobody in the world, especially not North Korea, comes close to challenging our military capabilities,” Gorka said.

“Whether they’re conventional, whether they’re nuclear or whether they’re special forces. So the message is very clear. Don’t test this White House, Pyongyang."

Trump sparked controversy on Tuesday with comments about North Korea made at his golf club in New Jersey.

“He has been very threatening beyond a normal state, and as I said they will be met with fire, fury and frankly power, the likes of which this world has never seen before,” the president said, referring to North Korea's leader, Kim Jong Un.

Trump’s comments followed a report in The Washington Post that North Korea successfully built a miniaturized nuclear warhead that can be placed on a missile.

This report was updated at 10:16 a.m.