Since the start of President Trump’s second term in office, a number of corporations have announced plans to expand their production capabilities in the U.S.

The announcements come as some of the Trump administration’s new tariffs take effect, with other import duties still pending. Although not all the companies expecting to grow their manufacturing footprint in the U.S. have directly cited the tariffs as a motivating factor, the White House has touted such moves as furthering Mr. Trump’s goal of stoking job-creation on home soil.

In March, for example, the White House celebrated pharmaceutical company Johnson & Johnson’s plan to invest $55 billion in U.S. manufacturing, calling it a “massive victory in President Donald J. Trump’s unrelenting pursuit of American manufacturing dominance” in a statement on its website.

For most companies, making such a shift would require committing hundreds of millions, or even billions, of dollars to building and expanding U.S. factories, economists say.

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