North Korea has ramped up its nuclear and ballistic missile programmes in recent months and continually threatened to target the US.
Donald Trump has pledged to “take care” of North Korea following its repeated threats of attack on the US, but he has so far failed to shut the brutal regime down.
Former US army officer and military analyst Ralph Peters said North Korea is not scaling back on its major military exercises and are using diplomatic talks to buy time to build its nuclear missile programme.
Speaking on Fox News, Mr Peters said: “I really think the sanctions are biting despite the Russians and Chinese cheating right and left.
“We need to come down even harder.”
Mr Peters said the US should focus on cutting off North Korea’s fuel supply and come down “hard” on the Chinese and Russians.
He said: “People have no power. In North Korea, the regime has the guns. The people that have the guns rule.
“What it does do is ultimately break the regime’s capability because, even in the 21st Century, all of our militaries still run on fossil fuels. We must run em down.”
North Korea claimed it was a “pipe dream” to think it would ever give up its nuclear programme after the UN imposed brutal sanctions to halt Kim Jong-un’s regime.
But in an effort to stop the rogue nation, the United Nations Security Council imposed tough sanctions on North Korea after its continued missile testing.
The resolution seeks to ban nearly 90 percent of refined petroleum product exports to North Korea.
Following the UN vote, Donald Trump wrote on Twitter: “The United Nations Security Council just voted 15-0 in favour of additional Sanctions on North Korea. The World wants Peace, not Death!”
The North Korea foreign ministry responded to the UN sanctions and branded them as an “act of war”.
China’s exports to North Korea increased more than 20 percent in the first three quarters of 2017, according to customs data.
But UN sanctions forced China to stop all exports of petroleum exports to North Korea in November, Chinese customs data showed.