But a CBS News report discusses a growing source of disquiet: In almost half the states with exchanges, the overwhelming majority of enrollments are coming from Medicaid, not the new insurance markets -- 87 percent in Washington, 82 percent in Kentucky and, last time I looked, 100 percent in Oregon (which delayed opening its insurance exchange in order to work out technical bugs). The Medicaid expansion side of the bill seems to be working fine in the states that opted for the expansion. But the private insurance side doesn?t seem to be getting a lot of pickup.