Trade barriers

In this Sept. 18, 2019, photo a Puckett Machinery Company technician walks past a new heavy duty Caterpillar excavator that awaits modification at Puckett Machinery Company in Flowood, Miss. On Tuesday, Oct. 1, the Institute for Supply Management, a trade group of purchasing managers, issues its index of manufacturing activity for September. (AP Photo/Rogelio V. Solis)

FILE - In this June 29, 2019, file photo, President Donald Trump, left, meets with Chinese President Xi Jinping during a meeting on the sidelines of the G-20 summit in Osaka, Japan. The Democratic impeachment inquiry may give Trump extra motivation to end his trade war with China, claim credit for a policy victory and divert a little attention from a congressional investigation into his dealings with Ukraine. But the partisan wrangling will complicate Trump's ambitious trade agenda overall, including his push to win congressional approval for a revamped North American trade agreement. (AP Photo/Susan Walsh, File)

In this Sept. 25, 2019, photo, a Chinese man adjusts his glasses as he monitors stock prices at a brokerage in Beijing. Asian stock markets followed Wall Street higher Thursday, Sept. 26, 2019, after U.S. President Donald Trump suggested a costly tariff war with China could be resolved soon. (AP Photo/Ng Han Guan)

FILE - In this May 13, 2019, file photo, a loader piles soybeans at the Frontier Coop in Schuyler, Neb. China's government says importers have agreed to buy American soybeans and pork. The announcement comes as the two sides make conciliatory gestures ahead of trade talks next month. (AP Photo/Nati Harnik, File)

Zimbabwe's President Emmerson Dambudzo Mnangagwa addresses the 74th session of the United Nations General Assembly, Wednesday, Sept. 25, 2019, at the U.N. headquarters. (AP Photo/Frank Franklin II)

CORRECTS COMPANY NAME TO TOYOTA MOTOR CORP. - Akio Toyoda, center, president and CEO of Toyota Motor Corp., with a group of the Japanese automakers chiefs speaks to Japanese Trade Minister Isshu Sugawara, not in picture, during a meeting Thursday, Sept. 26, 2019, in Tokyo. The U.S. and Japan on Wednesday signed a limited trade deal that will eliminate tariffs and expand market access on farm, industrial and digital products. But the deal does not address autos, a key sticking point during months of contentious negotiations, and President Donald Trump indicated the two countries were still working on a broader agreement. (AP Photo/Eugene Hoshiko)

President Donald Trump and Australian Prime Minister Scott Morrison arrive for a news conference in the East Room of the White House in Washington, Friday, Sept. 20, 2019. (AP Photo/Susan Walsh)

In this Wednesday, Sept. 11, 2019, photo, a man checks on the robotic arms at a factory making industrial robots in Zhengyu town of Haimen city in east China's Jiangsu province. A Chinese envoy is going to Washington on Wednesday, Sept. 18, to prepare for trade negotiations. The announcement Tuesday, Sept. 17, follows conciliatory gestures by both sides ahead of the October talks on their fight over trade and technology, which threatens to dampen global economic growth. (Chinatopix via AP)

This image provided on Sunday, Sept. 15, 2019, by the U.S. government and DigitalGlobe and annotated by the source, shows damage to the infrastructure at Saudi Aramco's Kuirais oil field in Buqyaq, Saudi Arabia. The drone attack Saturday on Saudi Arabia's Abqaiq plant and its Khurais oil field led to the interruption of an estimated 5.7 million barrels of the kingdom's crude oil production per day, equivalent to more than 5% of the world's daily supply. (U.S. government/Digital Globe via AP)