Iran Dominates in Iraq After U.S. ‘Handed the Country Over’ -- The New York Times

The United States spent more than $1 trillion and lost about 4,500 troops in the effort to make Iraq the cornerstone of a Western-facing Middle East. But today, Iran's influence is paramount. ...
https://www.nytimes.com/2017/07/15/world/middleeast/iran-iraq-iranian-power.html