The government of Iraq is secretly holding a Baathist cabal of military officers it claims attempted a coup against Prime Minister al-Maliki. The plotters were rounded up July 5 with the help of American military authorities after the Iraqi government's security warning center sent word to Mr. Maliki, who was in Kuwait on his first official visit as head of state, two highly placed Iraqi sources said. The prime minister quickly canceled a scheduled trip to Amman, Jordan, and returned to Baghdad to attend to the matter. At the time, Mr. Maliki's staff told reporters that the prime minister was...