Trade barriers

Molten aluminum is seen inside a smelter at the Alouette aluminum plant in Sept-Iles, Quebec, on May 21, 2019. The Trump administration said Tuesday, Spet. 15, 2020, it is dropping taxes on Canadian aluminum, easing tensions with a close ally and preempting Canada’s plans to impose retaliatory sanctions. (Jacques Boissinot/The Canadian Press via AP)

President Donald Trump walks on the South Lawn as he arrives at the White House, Monday, Sept. 14, 2020, in Washington from a trip to Phoenix. (AP Photo/Manuel Balce Ceneta)

Members of the "Bora Testar" or Let's Test project, walk through the the Paraisopolis neighborhood of Sao Paulo, Brazil, Friday, Sept. 11, 2020. The project plans to test up to 600 people for COVID-19 in the low income neighborhood, and to expand to other vulnerable communities in the country, financed by crowdfunding and donations. (AP Photo/Carla Carniel)

FILE - In this Monday, Aug. 3, 2020 file photo, a sign outside a pub reads: "Wanted Customers" in central London. The British economy recouped some further lost ground during July after a swath of coronavirus restrictions were lifted, official figures showed Friday Sept. 11, 2020. However, it still has to make up around half the output lost at the peak of the lockdown and now faces renewed risks related to Brexit. (AP Photo/Alastair Grant, file)

EU Chief negotiator Michel Barnier , second from left, arrives with his team at the Westminster Conference Centre in London, Wednesday, Sept. 9, 2020. UK and EU officials begin the eighth round of Brexit negotiations in London. (AP Photo/Alberto Pezzali)

Employees exit the ByteDance headquarters in Beijing, China on Friday, Aug. 7, 2020. President Donald Trump on Thursday ordered a sweeping but unspecified ban on dealings with the Chinese owners of consumer apps TikTok and WeChat, although it remains unclear if he has the legal authority to actually ban the apps from the U.S. TikTok is owned by Chinese company ByteDance. (AP Photo/Ng Han Guan)

FILE - A woman uses her phone as she passes by the ByteDance headquarters in Beijing, China, on Friday, Aug. 7, 2020. The Chinese government is complicating the U.S.-government-ordered sale of U.S. TikTok assets. China on Friday, Aug. 28, 2020 introduced export restrictions on artificial intelligence technology, seemingly including the type that TikTok uses to choose which videos to spool up to its users. That means TikTok's Chinese owner, ByteDance, would have to obtain a license to export any restricted technologies to a foreign company. (AP Photo/Ng Han Guan)

FILE - In this Nov. 9, 2017, file photo, an American flag is flown next to the Chinese national emblem during a welcome ceremony for visiting U.S. President Donald Trump outside the Great Hall of the People in Beijing. U.S. and Chinese trade envoys discussed strengthening coordination of their government’s economic policies during a phone meeting, the Ministry of Commerce announced. (AP Photo/Andy Wong, File)

FILE - In this March 13, 2020, file photo, lobsters await shipping at a wholesale distributer in Arundel, Maine. The United States and the European Union have announced a modest agreement to cut tariffs on less than $300 million worth of annual trade between them. The EU will drop import taxes on U.S. lobsters for the next five years and will work to make the move permanent. (AP Photo/Robert F. Bukaty, File)

In this Feb. 29, 2012, file photo a shopper looks over the wine at King & Godfree, one of Australia's oldest licensed grocery stores in, Melbourne, Australia. China on Tuesday, Aug. 18, 2020, began investigating whether Australia is dumping wine in a trade dispute that further strains relations between the countries and could shut the biggest export market for Australian wine. (AP Photo/Mal Fairclough, FILE)