Despite the recent US troop surge, neither the Americans nor the Iraqi regime enjoy popular support in Baghdad's sectarian enclaves.
Officials say a struggle for power between sectarian groups is now the main feature of the conflict.
The Americans are confident that their massive security crackdown has begun to reduce that violence - at least in Baghdad.
But a closer look at two sectarian strongholds - Sunni Adhamiya and the Shia suburb of Sadr City - shows few signs that the US army and the Iraqi regime have much popular support.
TX Channel 4 News March 2007