Roberts was a conservative and lifelong partisan Republican. … Roberts had dual goals for his tenure as chief justice – to push his own ideological agenda but also to preserve the Court’s place as a respected final arbiter of the nation’s disputes. … A complete nullification of the health care law on the eve of a presidential election would put the Court at the center of the campaign … Democrats, and perhaps Obama himself, would crusade against the Court, eroding its moral if not its legal authority. … Gradually, then with more urgency, Roberts began looking for a way out. Read more.