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In recent weeks, the U.S. media has highlighted Iraq's ties to the Islamic Republic of Iran -- namely, how it has helped Iran subvert the international sanctions regime and enabled Iranian support to the Syrian regime. This is leading to uncomfortable questions over whether the new Iraq is an ally of the United States, as President Barack Obama's administration claims, or a client state of Iran, as many of its neighbors fear. In fact, Baghdad's political allegiances are not so easy to pigeonhole. To understand Iraq's foreign policy, it is important to recognize how domestic and regional environments shape its behavior.