Complex sentence: He initially supported the Iraq War, but became disillusioned and in 2004 started a blog on "The New Republic" website called Iraq'd which chronicled the dilemma of pro-war liberals.
Split into simpler sentences: He initially supported the Iraq War, but became disillusioned. In 2004 he started "Iraq'd," a blog on "The New Republic" website, which chronicled the dilemma of pro-war liberals.