Key Voting Blocs Boost Obama in Indiana

So Barack Obama is back. The results on Tuesday did not provide the "game changer" Hillary Clinton so desperately needed. Instead, Obama built on his leads in delegates and the popular vote. His aides pointed to May 20 as the day when he will clinch a majority of elected delegates, essentially becoming the party's presumptive nominee. And that's not all.

In Indiana, Obama improved his support across several key demographics, despite a bruising month of attacks on his pastor, patriotism and populism. Compared to Ohio and Pennsylvania, he generally drew more votes from white women, Catholics, gun owners, households earning under $50,000 annually, voters prioritizing the economy, and voters without a college degree. A Democratic field operative sent in this graph of the progress: