The ruling Liberal Democratic Party on Tuesday formally decided to hold its leadership election on Sept. 20, in what is likely to be a two-way battle between Prime Minister Shinzo Abe and former Defense Minister Shigeru Ishiba.The LDP election effectively determines who will be prime minister. If Abe wins, he would be ensured a third term and be on track to become Japan's longest-serving leader.The Abe-led LDP won a landslide victory in the House of Representatives election in October last year. The next lower house election will be held in 2021 unless the body is dissolved.With the officia…READ FULL ARTICLE