Dark economic clouds gather anew over Obama campaign | Reuters

• Dark economic clouds gather anew over Obama campaign | Reuters

Poor manufacturing data earlier this week followed by a likely weak jobless report on Friday are reminding Obama that he has a lot of work to do to convince voters he is bringing the economy back to full health.

(Reuters) - After a month in which his re-election campaign picked up momentum, hard economic realities are about to hit President Barack Obama as he takes to the road on a campaign bus trip through the Rust Belt.

A Supreme Court victory for Obama on healthcare and a surprise expansion of immigration laws that put Republican opponent Mitt Romney on the defensive on the issue may soon fade from memory.

"By Friday, the Supreme Court will be in the rear-view mirror and everybody will be talking about the state of the economy," said Greg Valliere, an analyst for institutional investors at Potomac Research Group.

"I think the debate on Friday will be whether the economy is still growing or whether we've hit a brick wall," he said.

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