A sharp warning from voters for Prime Minister Shigeru Ishiba's party in Sunday's Tokyo assembly election has signaled that his tenure could be at risk, with his ruling bloc in danger of losing its majority in the upcoming national vote.The House of Councillors election, expected to take place on July 20, is shaping up as a de facto referendum on Ishiba's leadership, as the ruling coalition led by his Liberal Democratic Party has already become a minority in the House of Representatives.Some observers, meanwhile, said the conflict in the Middle East -- exacerbated by U.S. air strikes on key…READ FULL ARTICLE