TAIPEI, Taiwan — Foxconn, the world’s largest contract electronics maker, is considering setting up a display-making plant in the United States in an investment that would exceed $7 billion, the company’s chairman and chief executive, Terry Gou, said Sunday.

The plans come after President Trump pledged to put “America first” in his inauguration speech on Friday, prompting Mr. Gou to warn about the rise of protectionism and a trend for politics to underpin economic development.

Mr. Gou said that Foxconn, based in Taiwan, had been considering such a move for years. But the issue came up when a Foxconn business partner, Masayoshi Son, talked to Mr. Gou before a December meeting that Mr. Son had with Mr. Trump. Mr. Son is the head of SoftBank Group, based in Japan.

As a result of the meeting, Mr. Son pledged $50 billion of investment in the United States and inadvertently disclosed information showing Foxconn’s logo and an unspecified additional $7 billion investment. At the time, Foxconn issued a brief statement saying it was in preliminary discussions to expand its American operations, without elaborating.