NY Times on House v. Senate regulations of health insurance. Senate bill allows states more discretion and House bill establishes federal regulations. I think the article slightly overstates the differences between the two approaches, but there are differences. Interestingly, Karen Ignani of Assoc. of Health Plans (insurance lobby) states she views that 50 states each doing their own thing is not a good approach. Federal rules with state implementation always seemed most likely outcome to me, but folks in this article are saying some states will purposefully circumvent the rules.
This paper in New England Journal of Medicine by Timothy Jost sketches the argument.