"When people ask you what this election is about, you tell them it is still about hope. You tell them it is still about change," he said. It was a rebuttal to Romney's campaign, which has lately taken to mocking Obama's 2008 campaign mantra as "hype and blame."

If the economy is a potential ally for Romney, Obama holds other assets six months before the vote.

Unlike Romney, who struggled through a highly competitive primary season before recently wrapping up the nomination, Obama was unchallenged within his own party. As a result, his campaign's most recent filing showed cash on hand of $104 million, compared with a little over $10 million for Romney, and has worked to build organizations in several states for months.

But in the aftermath of recent Supreme Court rulings, modern presidential campaigns are more than ever waged on several fronts, and the effect of super political action committees and other outside groups able to raise donations in unlimited amounts is yet to be felt.