Donald Trump is on a trip to Asia in an effort to create a united front against North Korea.
Former US Army Special Forces Officer Jim Hanson insisted Mr Trump is reasserting his power so that the world will know “America is back”.
President Trump gave a speech in which he insisted the United States will not be taken advantage of anymore.
He said: ”I am always going to put America first, the same way I expect all of you in this room to put your countries first.”
North Korea has upped its hostile approach against the US and its Asian allies, sparking fears World War 3 could happen at any moment.
But Mr Hanson said that Mr Trump’s speech enforced his power against North Korea and China and insisted America has “changed the game”.
Appearing on Fox News, Mr Hanson lashed former US President Barack Obama and said: “I think after eight years of Obama’s cringing capitulation all around the world, it was a pleasure to watch President Trump proclaim that we will put America first, and to point out to the world that he’s not going to put up with the bad actions that we had in the past.
“He said that we’re going to go ahead and assert our power as the world’s sole superpower and make sure that people like China who have been, both on the economic stage and also in their support for North Korea, have been causing problems for the rest of us.
“So I think he’s really changed the game and put the world on notice that America is back.”
During the speech, the US President attacked the regime of North Korean leader Kim Jong-un and called on “all responsible nations” to come together to stop the nuclear threat from the rogue nation.
He said: “The world cannot tolerate the menace of a rogue regime that threatens it with nuclear devastation.
“All responsible nations must join forces to isolate the brutal regime of North Korea-to deny it any form of support.”