Production facilities

Deputy Prime Minister of Canada Chrystia Freeland, left, Mexico's top trade negotiator Jesus Seade, center, and U.S. Trade Representative Robert Lighthizer, sign an update to the North American Free Trade Agreement, at the national palace in Mexico City, Tuesday, Dec. 10. 2019. Observing from behind are Mexico's Treasury Secretary Arturo Herrera, left, Mexico's President Andres Manuel Lopez Obrador, second left, Mexico's Labor Secretary Maria Alcade, third left, and The President of the Mexican Senate Ricardo Monreal. (AP Photo/Marco Ugarte)

FILE - In this Nov. 20, 2019, file photo workers assemble Apple products at an Apple manufacturing plant in Austin, Texas. On Tuesday, Dec. 17, the Federal Reserve reports on U.S. industrial production for November. (AP Photo/ Evan Vucci, File)

An unmodified, open-pollinated American chestnut bur grows on a tree at the State University of New York's College of Environmental Science & Forestry Lafayette Road Experiment Station in Syracuse, N.Y., Monday, Sept. 30, 2019. The ESF American Chestnut Research & Restoration Project researchers have been able to add a gene to American chestnuts that give the trees resistance to a blight that decimated the trees in the 20th century. (AP Photo/Adrian Kraus)

FILE - In this Thursday, Oct. 24, 2019 file photo, United Auto Worker Lindsey Higgins, exits the the UAW Local 2250 Ken Worley Hall with her two children after voting on the offer made to union workers by General Motors in Wentzville, Mo. General Motors workers voted 57.2% in favor of a new contract with the company, bringing an immediate end to a contentious a 40-day strike that paralyzed GM's U.S. factories, Friday, Oct. 25, 2019. (Laurie Skrivan/St. Louis Post-Dispatch via AP, File)

FILE- In this Sept. 27, 2019, file photo worker Omar Glover pickets outside a General Motors facility in Langhorne, Pa. A tentative four year contract with striking General Motors gives workers a mix of pay raises, lump sum payments and an $11,000 signing bonus. (AP Photo/Matt Rourke, File)

Ryan Piper with the United Auto Workers continues to picket after news of a tentative contract agreement with General Motors, in Langhorne, Pa., Wednesday, Oct. 16, 2019. Bargainers for General Motors and the United Auto Workers reached a tentative contract deal on Wednesday that could end a monthlong strike that brought the company's U.S. factories to a standstill. (AP Photo/Matt Rourke)

A firefighter walks near the entrance to NuStar Energy fuel storage facility Wednesday, Oct. 16, 2019 after a Tuesday fire in Crockett, Calif. Officials were trying to determine Wednesday if a 4.5 magnitude earthquake triggered an explosion at a fuel storage facility in the San Francisco Bay Area that started a fire and trapped thousands in their homes for hours because of potentially unhealthy air. (AP Photo/Jeff Chiu)

In this Thursday, Oct. 10, 2019 photo, embers from the Saddleridge fire blow by firefighters in Sylmar, Calif. (AP Photo/Michael Owen Baker)

General Motors' Flint Assembly Plant employees line the street with picket signs during the nationwide UAW strike against General Motors on Monday, Oct. 7, 2019, in Flint, Mich. (Jake May/The Flint Journal via AP)

FILE - In this July 26, 2013, file photo, a motorist fills up with gasoline containing ethanol in Des Moines. The Trump administration says Friday, Oct. 4, 2019, it plans to implement new rules that will increase demand for ethanol, reversing a decline caused by exemptions given to oil refineries. (AP Photo/Charlie Riedel, File)