The US has been running large trade deficits (that is, borrowing large amounts of money from foreigners) since the late 1960s. First, Japan lent most of the money. Later, China became a big lender.
The US in March imposed steel and aluminum tariffs in the name of national security, a move widely regarded as potentially devastating to the global trading system if other countries follow suits by bypassing the World Trade Organization.
The USTR announced the decision shortly after China's Ministry of Commerce said Vice-Premier Liu He spoke by phone with American trade officials.
The US has also placed pressure on allies to boycott the Chinese company. Last week, the UK Digital Secretary Nicky Morgan said the government will decide if it will continue to allow Huawei to build network infrastructure in Britain by the fall.
The US Federal Communications Commission said on Monday it will vote in November whether to bar communications companies from using its Universal Service Fund to purchase equipment or services from Huawei and ZTE, whom it accused of "posing a national security threat".
The US recognized the nature of such laws, producing numerous overlapping ones, such as the USA Patriot Act and the Homeland Security Act.
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The US Department of Commerce did not reply to a request for comment on whether the incident might be related to its move on May 16 to add Huawei to the so-called "Entity List," preventing it buying certain items from US companies without US government approval.
The US Geological Survey said the magnitude-6.8 quake had an epicenter 55 miles (89 kilometers) west of Tarauaca, Brazil, and 204 miles (329 kms) east of Pucallpa, Peru. It hit at 2:25 pm local time and had a depth of 575 kilometers.
The USS Dewey, a guided missile destroyer, sailed less than 12 nautical miles from the Meiji Reef of the Nansha Islands early Thursday, the first such case under the administration of US President Donald Trump, US media reported, citing US military officials.
The United Nation's Intergovernmental Panel on Climate Change also estimated that planting trees on 1 billion hectares of land (roughly the same amount as the total suggested in the study) would prevent average temperatures from rising by 1.5 C by 2050.