Regional trade

Democratic presidential candidate U.S. Sen. Bernie Sanders arrives onstage at the "Workers' Presidential Summit" at the Convention Center in Philadelphia Tuesday, Sept. 17, 2019. The Philadelphia Council of the AFL-CIO hosted the event. (Tom Gralish/The Philadelphia Inquirer via AP)

U.S. Secretary of State Mike Pompeo is presented with flowers as he boards his plane to depart for Australia from Don Mueang International Airport, in Bangkok, Thailand, Saturday, Aug. 3, 2019. (Jonathan Ernst/Pool Photo via AP)

Thai investigators cordon-off an area in which an explosion injured people in Bangkok, Thailand, Friday, Aug. 2, 2019. Thai Prime Minister Prayuth Chan-o-cha on Friday ordered an investigation into several small bombings in Bangkok that took place as Thailand was hosting a high-level meeting attended by U.S. Secretary of State Mike Pompeo and his counterparts from China and several Asia-Pacific countries.(AP Photo/Gemunu Amarasinghe)

U.S. Secretary of State Mike Pompeo, left, shakes hands with Vietnam's Deputy Prime Minister and Foreign Minister Phạm Binh Minh as ASEAN Secretary-General Dato Lim Jock Hoi, right, looks on, ahead of the ministerial meeting between Association of Southeast Asian Nations (ASEAN) Foreign Ministers' and the U.S. in Bangkok, Thailand, Thursday, Aug 1, 2019. (AP Photo/Gemunu Amarasinghe)

U.S. Secretary of State Mike Pompeo walks to hold a press conference during Association of Southeast Asian Nations (ASEAN) and affiliated meetings in Bangkok, Thailand, Thursday, Aug. 1, 2019. (AP Photo/Gemunu Amarasinghe)

U.S. Secretary of State Mike Pompeo, left, and Thailand's Foreign Minister Don Pramudwinai, get ready for ASEAN-U.S. meeting on the sidelines of the Association of Southeast Asian Nations (ASEAN) Foreign Ministers' meeting in Bangkok, Thailand, Thursday, Aug. 1, 2019. (AP Photo/Sakchai Lalit)

China's Foreign Minister Wang Yi, center, claps his hand after pose for a group photo during the ASEAN-China Foreign Ministers Meeting in Bangkok, Thailand, Wednesday, July 31, 2019. Southeast Asian foreign ministers opened their annual meeting Wednesday with a call from host Thailand for deeper integration to expand trade and bolster prosperity in the region amid rising global challenges.(AP Photo/Gemunu Amarasinghe)

Russian Foreign Minister Sergey Lavrov, left, and Thailand Foreign Minister Don Pramudwinai share a light moment after a press conference at Foreign Ministry in Bangkok, Thailand, Tuesday, July 30, 2019. Top diplomats from the Asia-Pacific region started gathering Tuesday in the Thai capital to discuss issues of concern to the area, including security on the Korean peninsula and China's territorial claims in the South China Sea. (AP Photo/Sakchai Lalit)

FILE - In this June 18, 2019, file photo, U.S. Trade Representative Robert Lighthizer testifies before the Senate Finance Committee on Capitol Hill in Washington. Congressional Democrats appear to be moving from “no way’’ to “maybe’’ on President Donald Trump’s rewrite of a trade pact with Canada and Mexico. House Democrats have met four times with Lighthizer, most recently on Friday, July 26, and both sides say they are making progress toward a deal that would clear the way for Congress to approve Trump’s U.S.-Mexico-Canada Agreement, or USMCA. (AP Photo/Susan Walsh, File)