Here are a couple of graphs to explain how he won.

1. Visual Graph from NYTimes
2. US National Geographic map of where candidates found support. (with a summary timeline) - source: NY Times

In summary, it appears that Obama’s main support is in the south, and some on the east coast, with pockets here in there. Naturally, his biggest support is in Chicago. In the first image, you will see that he easily wins the black vote, and younger voters as well. There seems to be a reverse correlation between age and Obama support, however.

In his first order of business as his party’s presumed presidential nominee, Barack Obama instructed the Democratic National Committee to adopt his policy against accepting donations from federal lobbyists or political action committees.

You may remember recent news of McCain’s campaign managers ties to the Junta (in myanmar), and his senior advisers being former lobbyists. It probably won’t be as big a deal as the mainstream media is making it out to be, but we’ll see in the coming months.