Trump Is Promising a Manufacturing Renaissance. Is That Even Possible? Trump Is Promising a Manufacturing Renaissance. Is That Even Possible?

The president says “jobs and factories will come roaring back” because of his trade policies, but the economic story of the American 21st century has also been shaped by the deliberate pursuit of freer trade.

President Trump’s imposition of tariffs on a scale unseen in nearly a century is more than a shot across the bow at U.S. trading partners. If kept in place, the import taxes will also launch an economic project of defiant nostalgia: an attempt to reclaim America’s place as a dominant manufacturing power.

In the postwar heyday of American manufacturing, which endured into the 1970s, nearly 20 million people once made their living from manufacturing. The United States was a leading producer of motor vehicles, aircraft and steel, and manufacturing accounted for more than a quarter of total employment.

By the end of last year, after a fundamental reordering of the world economy, manufacturing employed about 8 percent of the nation’s workers.

Now, the country is wealthier than ever. Yet the economy looks, and feels, quite different — dominated by service work of all types, both lucrative and low-wage. Industrial hubs in the American interior have often withered, leaving many strongholds of Mr. Trump’s base on the economic fringes.

Protectionist industrial policies, of varying methods and attitudes, have been on the rise for a decade — from the time Mr. Trump began his first campaign for president in 2015 through the presidency of Joseph R. Biden Jr. and now with Mr. Trump in the Oval Office again.

But the president’s announcement, at a flag-draped Rose Garden ceremony on Wednesday, represented a tectonic shift in U.S. economic policy, the fullest repudiation of an embrace of global free trade that began on a bipartisan basis in the 1980s.