H.R. McMaster
H.R. McMaster Reuters

The US is preparing a possible military option against the threat of North Korea, among other options, US President Donald Trump's National Security Advisor H.R. McMaster said Wednesday.

“The threat is much more immediate now and so it’s clear that we can’t repeat the same approach – the failed approach of the past,” McMaster said during a security conference with Homeland Security Chief John Kelly, Fox News reported.

McMaster added that it would be "insanity" for the US to continue to pursue the same policy on North Korea as it has in the past and expect a better result, alluding to Albert Einstein's famous similar remark on the definition of insanity.

President Trump is scheduled to meet tomorrow with South Korean President Moon Jae-in, who has vowed to stand with Trump against North Korea.

"Together we will achieve the dismantlement of North Korea's nuclear program, peace on the Korean Peninsula and eventually peace in Northeast Asia," Moon said.

Tensions between the US and North Korea have risen in recent weeks since the death of Otto Warmbier, the 22 year old college student who passed away six days after being returned to his family in a coma.

Warmbier suffered severe brain damage while in North Korean captivity for 17 months. He had been sentenced to 15 years in prison for stealing a poster.

Following Warmbier's death, President Trump called the regime of North Korean dictator Kim Jong-Un a "brutal regime" and said that the young man's treatment was "a tragic example of North Korea's disregard for human life."

North Korea responded by accusing the Trump Administration of being worse than the Nazis.