At her confirmation hearing in early 2021, Treasury Secretary Janet L. Yellen struck a tough tone on China, describing it as America’s most important strategic competitor and pledging to confront its “abusive, unfair and illegal practices” that she said were harming businesses and workers in the United States.Since then, Ms. Yellen has emerged as a voice of moderation in the Biden administration, embracing the mantle of economic pragmatism as the world economy copes with inflation and sluggish growth. The Treasury secretary has expressed objections to China’s record on human rights, called for diversifying American supply chains and acknowledged that protecting national security is paramount.But she has also been the administration’s most prominent proponent of maintaining economic tie …
