Delegate Math Update[UPDATED]
With MS and WY settled, and a better idea of the final delegate counts in OH and the TX caucus, a revised CA count, and final results certified in CO, all the pledged delegates from states already voting have now been alloted by some news organization or another. The current pledged delegate count on that score has Obama up by 154 160, 1414.5 to 1254.5. With 566 pledged delegates still remaining, Clinton would have to win 63.5% 64.1% of them to catch him in that category.

Adding superdelegates who have endorsed, Obama's lead is cut to 117 124 125, 1623.5 to 1498.5. There are 342 341 of those yet to endorse. To catch him in the overall count, Hillary will have to win 56.4% 56.8% 56.9% of the remaining 908 907 delegates, pledged and superdelegates combined.

All of that contingent on whatever they do with FL and MI.

[UPDATE: First of all, when an update gets updated, you know that the original suffered from bad timing, which this one did. Here's what happened: Iowa's county caucuses took place on Saturday, and in all of the hullabaloo Obama gained 1 of Clinton's delegates (don't ask me how that happens. I don't know.) and 8 of Edwards' for a net gain of 10. Meanwhile, that revised CA count got revised again but in Hillary's favor (net O loss of 2), and DC may have moved from 12-3 Obama to 11-4 (another loss of 2). Overall a net Obama gain of 6. Numbers updated above to reflect.]