Yikes... the quotes in that article are pretty disingenuous. Anthem is stopping selling new child-only policies. Children can still get coverage under family policies, and existing child-only policies are still in place. They're hardly denying coverage to "all children."
This was a pretty obvious step and I sincerely doubt politicians didn't know they were going to do this (unless said politicians are horrendously stupid). If we require insurers to take children with pre-existing conditions, and don't have any mandate for everyone to buy policies for all children, no insurer in their right mind is going to offer a child-only policy. What makes sense -- and what the insurers did -- is to cover children under family plans.
I get that insurers make great villains (especially in election season) but this is just silly.