A prime example is the law in the Health Care bill that bans pre-existing conditions. This and other mandates will put private companies out of business. It sounds good on the stump but it is insane.
Over a dozen states already have some form of guaranteed issue laws (6 completely unrestricted). Do you think no private insurers exist in those states, just public payers?
I wonder what the rates are relative to states that don't have such laws.