The executive, Jim Farley, said President Trump’s tariff and auto policies would raise costs and could force the automaker to cut jobs.

The 10 percent tariff the president said he might impose in March could cause U.S. refineries to cut production and lead to higher prices.

About 80 percent of manufacturing investments spurred by a Biden-era climate law have flowed to Republican districts. Efforts to stop federal payments are already causing pain.

There are many reasons to regret Trump’s latest experiment with tariffs, but let’s take prices and migration.

General Motors and a few other companies make as much as 40 percent of their North American cars and trucks in Canada and Mexico, leaving them vulnerable to tariffs.

Manufacturers from Asia, Europe and elsewhere have poured billions into North American supply chains that could be hit by new taxes on Mexico, Canada and China.

Ties between the United States and Mexico have deepened over 30 years of free trade, creating both benefits and irritants.

By declaring he’d put tariffs on goods from the South American country, the president imperiled a growing influx of foreign investment there.

The president wants to begin renegotiating a U.S. trade deal with Canada and Mexico earlier than a scheduled 2026 review, people familiar with his thinking said.

Automakers and even some Republicans may fight to preserve funds, and environmental activists will likely sue, but some experts said that some changes may not survive legal challenges.

Fourteen Opinion writers assess the substance and style of Trump’s speech.

Jake Sullivan, the national security adviser, said in an interview that “we’ve just stuck with our theory, which is managed competition.” Trump and Xi Jinping might have other plans.

Airlines have been increasingly outsourcing repair and upkeep work to other countries, but experts and consumer groups disagree about its impact on safety.

The company said its Columbus plant could eventually produce tens of thousands of autonomous systems and weapons each year.

The company’s renewed interest comes after the Biden administration blocked Nippon Steel from acquiring the onetime American powerhouse.

China’s vast exports in 2024 exceeded its imports on a scale seldom seen anywhere except during or immediately after the two world wars.

The United Automobile Workers union asked a federal labor regulator to conduct an election at a factory Ford jointly owns with a South Korean battery company.

The theory seemed sound: Stabilize financial markets, support the poor and promote a more secure, integrated world. But blue-collar workers were left behind.

The companies have found plenty of new channels to the U.S. market — demonstrating the potential limits of the tariffs Donald Trump has promised to impose.

Taiwan Semiconductor Manufacturing Company, a global tech giant, brought thousands of workers from Asia to the Phoenix suburbs for jobs at a plant that the Biden administration helped fund.