Lost amid the news of all the bloodletting in Iraq is an important political development: The Kurds have switched sides. In the first parliament after the first set of elections, they allied themselves with the Shiite slate to produce the current Shiite-dominated government led by Ibrahim al-Jafari. Now the Kurds have joined with the opposition Sunni and secular parties to oppose the Shiite bloc. The result is two large competing coalitions: (a) the Kurd-Sunni-secular bloc, which controls about 140 seats in the 275-seat parliament and would constitute the barest majority, and (b) the Shiite bloc, which itself is a coalition...