“The President-elect’s threat of a ‘big border tax’ is bad policy and bad precedent,” said the political action committee’s president, David McIntosh. “American consumers, workers and businesses would be the big losers if tariffs were used to arbitrarily punish companies.”

The auto industry has been a popular target of the president-elect’s, especially as he campaigned on bringing back jobs to the United States. It has managed to knock the industry on its heels, as it comes off a record year of sales. Ford, an early target of Mr. Trump’s, said on Tuesday that it was ditching plans to build a plant in Mexico and instead would invest millions building out production in Michigan.

But keeping or creating more of these auto manufacturing jobs in the United States may not necessarily be a good thing for everyone. In Mexico, wages rarely cross $10 an hour, a third of what a majority of unionized workers in the United States earn.

For Americans looking to buy cars, those higher wages could add up to higher sticker prices.

One last effort to derail Trump’s presidency

Could Mr. Trump’s presidency be derailed on a technicality? Probably not, but his opponents keep trying.

A joint session of Congress will convene on Friday, with Vice President Joseph R. Biden Jr. presiding, to count the electoral votes and officially name Mr. Trump the 45th president of the United States.

But wait!

A team of anti-Trump lawyers has done a painstaking, exhaustive look at each of the 300-odd electors who cast their votes for Mr. Trump. Their conclusion: at least 50 were ineligible to serve as electors, either because they did not live in the congressional district they represented or they held dual posts — elector and some other position — contrary to the rules of their states.

“We urge you, our representatives, to prepare written objections for Jan. 6th,” the team wrote at the top of a 1,000-page legal brief.