Obama supporters can breathe a little easier this morning. His margin in North Carolina was much bigger than the latest polls had predicted, and Clinton's margin in Indiana was much smaller.

Still, Clinton seems determined to - as she puts it - fight on. And she's expected to win two of the next Democratic primaries, in West Virginia (May 13) and Kentucky (May 20). News reports for the past two weeks have focused on Obama's negatives; that'll change now, thanks to yesterday's results, but the mood of those reports could swing back to Clinton's favor in just a week.

CNN was reporting this morning that Obama is expected to pick up more superdelegates soon, perhaps today, and that may help as well. But Clinton's "on to the White House" remark last night and her campaign's continued insistence that Michigan and Florida be counted make me nervous.

It was a relief to see that Clinton's pandering about the gas tax didn't pay off for her. And it was just a hoot to see her saying she doesn't care what economists say about the tax; sounds a little like George Bush and global warming, yes?

But it's troubling to see that Obama still hasn't found a way to attract the majority of working-class white voters. Whether that's due to his race or Clinton's faux good-old-girlness is hard to tell. It's a significant hurdle, though. And he'll have to find a way to change that before the fall.