<h1>Biden Administration Extends Deadline for Nippon Steel's US Steel Acquisition Amid Security Concerns and Union Opposition.</h1> The Biden Administration has extended the deadline to mid-June for Japan's Nippon Steel to acquire US Steel, after initially blocking the deal due to national security concerns. This extension offers hope for the acquisition, despite opposition from both President Biden and President-elect Trump. The US Committee on Foreign Investment in the United States (CFIUS) was divided on the security threat posed by the deal. Nippon Steel and US Steel argue that the acquisition poses no security risk and have filed lawsuits against the decision. The United Steelworkers union opposes the deal, fearing job losses and labor agreement violations, while some union members support it for potential investment benefits.