Barack Obama is hemmorhaging support against John McCain in states where Democrats can/should win in November.

In the last six weeks, Barack Obama has been losing support, while Hillary Clinton has gained support, when matched against McCain. Much of Clinton’s additional support is from voters who were undecided in late February, and Clinton essentially “split” the “recent deciders” with McCain; as a result there is little change in her margins against McCain. But people who were undecided whether they preferred Obama or McCain are also making up their minds – and choosing McCain. As a result, Obama’s margins against McCain are looking much worse.

This is true among all major demographic categories that were available for comparison – if Obama improves in a category, Clinton has shown greater improvement in that category. And in categories where Clinton is not doing as well as she was in February, Obama is doing consistently worse.