The US also burnished its credentials as a major-tournament host with last year's 16-team Copa America Centenario.
The United States evacuated more than 300 nationals on Monday on two chartered flights and six South Koreans and one Japanese spouse flew to South Korea early on Wednesday on a chartered flight.
The United States wants peace, Trump said, and he hopes DPRK leader Kim Jong-un also wants peace. That will be "the end determination", he said.
The US investigation into the "renminbi undervaluation" contradicts an earlier decision by the US Treasury Department to remove China's designation as a currency manipulator in January as part of the phase one trade deal, said Ma Yu, a senior researcher at the Beijing-based China Academy of International Trade and Economic Cooperation.
The US also reported 3,656 deaths on Wednesday, according to Johns Hopkins data, surpassing a record 3,306 reported Dec 11. Overall, more than 307,500 people have died of the disease in the US, according to Johns Hopkins data.
The UK government had not yet responded to Trump's comments, but when he was questioned by a journalist about the Sun interview on Friday morning, Trump said the US and UK "really have a very good relationship".
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The US is by far the world's biggest spender: It poured 2.8 percent of its gross domestic product into R&D in 2015, when China's spending was 2.1 percent, according to the 2015 UIS Innovation Data Collection, the latest survey released by the UNESCO Institute of Statistics in April.
The USTR announced on July 10 plans to impose 10 to 25 percent tariff on an additional 0 billion worth of Chinese imports. That list does not include medical devices, but some parts and materials.
The US Chamber of Commerce estimated that trade supports 3,150,600 Texas jobs. Around .4 billion in Texas exports to China are targeted for retaliation. Its hardest hit industries would be liquefied propane, grain sorghum and cotton.
The US has ignited the largest trade war in economic history, as additional tariffs on Chinese goods violate World Trade Organization rules and represent a typical "trade bully", posing a grave threat to the global industrial value chain, according to a statement by the Ministry of Commerce.