The Democrats are perfectly well aware that millions of Americans will lose the coverage they have under their proposal, whatever form it finally takes. In fact, that’s their objective: in the long run–President Obama has said it may take 10 to 20 years–they intend to force all of us to lose our private health care and be forced into a socialized medicine system.
At the link, a report on a simple amendment that tested the Democrats’ sincerity on letting people keep the coverage they now have, if they like it. You know how it turned out without looking, of course, but it is interesting.