Yeap, and a bunch of Senators, Congressmen, and senior military brass warned Obama not to withdraw from Iraq without leaving a residual force, but Obama would not listen. How many thousands of people lost their lives because of that blunder? How many American soldiers died correcting that blunder?
Obama's apologists argue that Obama "tried" to get the Iraqis to "allow" him to leave a residual force (yeah, he put Joe Biden in charge of that). Well, folks, that's when you put on your big boy pants and you tell the Iraqis, "Look, fellas, there is no way we are leaving here without leaving a residual force because you are not ready to handle things on your own yet." Period. Just like that. Just like we've done several other times in our history.
But, instead, Obama completely pulled out of Iraq, and as a direct result of that terrible blunder, ISIS arose, took control of a huge chunk of Iraq and Syria, killed thousands of people, sold many women into sex slavery, etc., etc. Funny, but I don't recall seeing any liberal thread protesting Obama's refusal to listen to all those who told him to insist on leaving a residual force.