WASHINGTON/TOKYO — U.S. President Joe Biden’s decision to block Nippon Steel’s $14.9 billion bid for U.S. Steel cast a shadow over Secretary of State Antony Blinken’s visit to Japan on Tuesday for farewell meetings with Washington’s most important ally in Asia. The rejection, announced on Friday, has jolted U.S. efforts to boost ties with Asian allies just as South Korea’s political crisis potentially complicates a revived relationship between Washington, Seoul and Tokyo. The trilateral alliance is a key plank in the countries’ efforts to counter China’s military buildup. Investment into the U.S. could also be chilled, but analysts say any