"There are 25 million people living in Seoul", Daines told Fox News.
South Korean President Moon Jae-in insisted Thursday he has "confidence" in his own military as he moved to take wartime operational control from the United States.
The information was later picked up by North Korean Foreign Minister Ri Yong Ho, who claimed on Monday U.S. President Donald Trump had "declared war" on his country following Trump's speech at the United Nations General Assembly.
The North has accused Trump of declaring war after he warned Kim's regime would not last if he persisted in threatening the United States and its allies, having earlier warned North Korea would be totally destroyed in such an event.
The North Korean regime poses a "grave threat" to the US and the world, according to Sen. "North Korea's behavior serves as a decisive opportunity for overcoming the peace crisis on the Korean Peninsula and turning the situation around. We will make North Korea realize that it has no future should it try to face the rest of the world with nukes", he said.
South Korea's currency chief said on Wednesday that his top priority is managing risks to the country's financial markets from rising tensions over North Korea, as the won slid to a six-week low.
South Korean lawmakers said Chung had told them the United States and South Korea had agreed on the rotational deployment of USA strategic assets to South Korea, possibly as soon as year-end.
"Short-term, its hard to expect markets to recover fast (from North Korea related jitters)", Hwang said, adding that his team will be on stand-by to provide policy responses to any escalations that occur over the long Chuseok holiday from October 2 through October 9, when local financial markets will be closed. The nature of the assets was not specified.
China opposes the deployment of THAAD because it believes its powerful radar could be used to look inside its territory.