A Nippon Steel executive condemned President Joe Biden for blocking the company’s purchase of U.S. Steel.

After Biden blocked the purchase on Jan. 3, the company sued the U.S. government. In an op-ed for the Wall Street Journal, Takahiro Mori, Nippon Steel’s vice chairman and representative director, argued that the Committee on Foreign Investment in the United States’s review “failed to meet the most basic requirements of due process and fairness” and that Biden’s decision was a purely political one.