Trump says US is ready to act alone on North Korea

It has staged five nuclear tests so far, two a year ago. "So, I think the world should be ready to deal with this kind of person".

Beijing fears a potential North Korean collapse, which would result in "a unified Korea allied with the United States on their border", Carter said.

President Donald Trump's top national security aides have completed a broad review of USA options aimed at countering North Korea's nuclear and missile programs, a senior US official said on Sunday.

Trump plans to ask President Xi Jinping of China to help put pressure on North Korea during their scheduled meeting this week at his Mar-a-Lago club in Florida. "That is all I am telling you", he said in an interview with the Financial Times of London. "And if they do that will be very good for China, and if they don't it won't be good for anyone".

Secretary of State Rex Tillerson visited China last month to press North Korea's neighbor for help in mitigating that threat, and Trump is scheduled to host Chinese President Xi Jinping this week in the U.S., where he intends to bring the issue up.

USA stock index futures pointed to a marginally higher open on Monday ahead of the two leaders' meeting this week at Trump's Mar-a-Lago golf course in Florida.

Thae said he wasn't involved in the country's missile programs, but believes it has "reached a very significant level of nuclear development". "And China has great influence over North Korea". While the country has around eight nuclear weapons, it has not show the ability to attach them to a long-range missile.

The chief US concern is North Korea's efforts to develop an intercontinental nuclear missile that could carry a nuclear warhead and be capable of hitting the United States.

"They have the nuclear capability - they've demonstrated that", Admiral Scott Swift, commander of the US Pacific Fleet, told NBC.

On trade, Trump campaigned on taking a hard line with China over both the trade deficit and what he sees as currency manipulation with the RMB. "You know, I am not the United States of the past where we tell you where we are going to hit in the Middle East".

The relationship between the United States and China has been uncertain since Trump's election.

Former US defense secretary Ash Carter, who served under Barack Obama, said the US has "always had all options on the table".

But he said a U.S. strike on North Korea would likely trigger a North Korean attempt to invade South Korea.

Trump sees North Korea as a direct military threat to the United States and its Asian allies, Japan and the Republic of Korea (South Korea).

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