A Nippon Steel Corp. executive met senior U.S. government officials in Washington on Wednesday, sources close to the matter said, in an apparent attempt to win support for its envisioned acquisition of United States Steel Corp. The meeting between Nippon Steel Vice President Takahiro Mori and members of the U.S. committee on foreign investment comes as Washington is reportedly preparing to block the deal, citing potential national security risks related to foreign ownership. U.S. media have reported President Joe Biden’s administration is in the final stages of blocking the $14.1 billion takeo…