How much would humanitarian interest and effort change if the US left Iraq?

I base this question on the notion that US involvement in global matters seems to increase interest in them, so, whatever the security implications could be, I wonder how much media coverage would change if the US left. If it decreases, which I lean toward believing it would, would that also lessen the affect on the public, thereby reducing their activism and donation on behalf of the Iraqi people? By how much, if at all, would this happen?