Obama's approach emulates Massachusetts' except for mandate on covering all adults

Approximately 439,000 people here have gained insurance since Massachusetts embarked two years ago on a path to near-universal coverage. More than half of them are paying toward it; the rest, get it free. How close Massachusetts can come to its goal, and what obstacles it encounters, is significant, because its strategies resemble much of the approach to healthcare that Obama has said he would pursue if elected president.