whether to hold attorney general of the united states, eric holder, in contempt of congress. that vote expected this hour. i m wolf blitzer. you re in the situation room. it s the most anticipated supreme court decision in more than a decade. and one that impacts the lives of almost every american as well as the presidential campaign. in a 5 to 4 split, the supreme court upheld the affordable care act, a law so tightly bound to president obama that both critics and supporters call it and i m calling it now what they are calling it, obama care. behind the historic ruling and meticulous legal reasoning that caught many observers offguard as well as the surprise split that saw the chief justice of the united states, john roberts, siding with the courts four liberal justices. kate bolduan begins outside. reporter: absolutely, wolf. a bombshell ruling. the individual mandate, the centerpiece, but getting to that conclusion was a surprising revelation. the chief justice wr