Opening a day of campaigning across battleground Virginia, Republican presidential nominee Mitt Romney offered himself here Thursday as a champion of business whose policies would usher in new jobs and rising incomes for America’s workers and entrepreneurs.

Campaigning in Roanoke, Va., Mitt Romney said that President Obama doesn't understand how business works.

Addressing a crowd of about 2,800 on the factory floor of a window and door manufacturer in Roanoke, Romney pounced on a proposal President Obama reintroduced this week to consolidate multiple government agencies under a single secretary of business, charging that the president does not have the business know-how to jump-start the slow economy.

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