Here's my op-ed that uses long-term orientation, probabilistic thinking, numeracy, consider the alternative, reaching our actual goals, avoiding intuitive emotional reactions and attention bias, and other rationality techniques to suggest more rational responses to the Paris attacks and the ISIS threat. It's published in the Sunday edition of The Plain Dealer, a major newspaper (16th in the US). This is part of my broader project, Intentional Insights, of conveying rational thinking, including about politics, to a broad audience to raise the sanity waterline.
He promised that to his voters, if I remember correctly.
May be not a good reasons strategically, but still a good reason politically.
You're going along with a blatant and partisan lie. GW Bush accepted a deadline for withdrawal after the Iraqi government made noise about Iraqi sovereignty. Obama technically tried to negotiate a new deal to keep troops there, but could not reach agreement about legal immunity. If you squint and turn your head you could try to see this as Obama choosing to withdraw, but to say he did it "unilaterally" is a bald-faced lie.