In this blog post by Arnold Kling, he writes
I fear that there is no one close to President Obama who is capable of voicing dissent regarding either his substance or his tone. He needs somebody to to tell him that people who disagree with him are not necessarily evil or stupid. They are just people who disagree with him.Why would the president not have anyone within his circle that can voice dissent? He determines his circle, right? So he either has never had a dissenting voice near him and has not actively sought one, or he has purged dissenting voices from his circle. Both possibilities are believable to me. Kling wants this to change. This means the president must seek out dissenting voices or tolerate them when they pop up organically. But if he thinks "people who disagree with him are...evil or stupid," how likely is this? Especially when anyone who says, "People who disagree with you are not necessarily evil or stupid" are, in the process of saying this, disagreeing with him, and so fitting into his definition of evil or stupid?