Iran is materially assisting and attempting to influence, in most cases against the United States, major Shiite Muslim factions in Iraq, most of which have ideological, political, and religious ties to Tehran. The Administration asserts that Tehran is actively directing, training, and arming Shiite militiamen linked, to varying degrees, to hardline anti-U.S. cleric Moqtada Al Sadr. Some analysts see a virtual "proxy war" between the United States and Iran inside Iraq.