Was prepared to strike down the heart of this law, the so-called individual mandate. of course, it requires all americans to buy insurance or pay a penalty. but roberts, i'm told by my sources, changed hi views, decided to instead join with the liberals. and he withstood, i'm told by my sources, a month-long desperate campaign my the conservative justices to bring him back to the fold. and that campaign was led, ironically, by justice anthony kennedy. >> joining me now are julian epstein, a democratic strategist, and a former democratic counsel to the house judiciary committee, and paul campos...