brian todd is here, he's been taking a comparison of both of these programs. what are you seeing? >> wolf, the comparisons are not straightforward. because when you look at the president's plan, much of that vfs projections for the future. so they're unclear. we did look at some things you can measure in massachusetts, including cost to the consumer and the access patients get to doctors. >> president obama again using massachusetts as the model for his health care law. like under romney care, he contends, many more people will be covered. but a top critic of the president's plan worries about another unfavorable comparison to what happened in massachusetts. >> about 70% of primary care doctors at the time, before romney care, were accepting new patients. that has dropped down to 50%. and we're going to see the same problem nation-wide as obama care rolls out. >> that's because doctors get reimbursed less as more patients enroll. an expert who helped craft romney's and obama's plans says the doctor crunch isn't unique