Nippon Steel said it wouldn't be deterred by Biden’s decision last week to block its $15 billion bid for the storied U.S. steelmaker.

The foreign ministers of Japan and the United States said their countries' ties were stronger than ever on Tuesday, even after Japan's prime minister called U.S. President Joe Biden's decision to block Nippon Steel's $14.

The assessment by analysts comes after US President Joe Biden blocked Nippon Steel Corp’s US$14.9 billion bid for US Steel Corp.

The companies argued in a lawsuit announced on Monday that Biden violated the Constitution by blocking the merger via a sham national security review that deprived the companies of their right to a fair process.

U.S. Steel and Japan’s Nippon Steel sued the United States government on Monday in a last-ditch attempt to revive their attempted merger after President Biden blocked it last week on the basis that the transaction posed a threat to national security.

U.S. Steel and the Japanese firm that had sought to acquire it are suing the Biden administration after the president announced he was blocking a proposed deal for the iconic American manufacturer.