Mike Barnicle prefaced his remarks on Obamacare by saying his understanding was "meager." He was grossly . . . overstating his knowledge. The subject in the Morning Joe segment today was UnitedHealthCare's decision to quit the Obamacare exchanges. Dr. Dave Campbell explained that UnitedHealthcare was going to lose $1 billion on Obamacare this year, and that all other insurers were also losing money. That's when Barnicle piped up: "my understanding of it, meager as it is: so it's the profit motive that's going to drive these insurance companies out of the exchanges. They have boards of directors. They can't figure...