Tonight's Democratic forum on MSNBC was great. Rachel Maddow asked grownup, important questions and all three candidates gave grownup, substantive answers. With one notable exception. When Rachel Maddow asked O'Malley about Keystone, she ticked off the Democrats who came to oppose it, including Hillary Clinton. O'Malley shot back that she "finally came around last week." A factcheck is in order here.