Mitt Romney campaigns at the shuttered Solyndra plant in Fremont, Calif., on Thursday. "It's a symbol not of success, but of failure," he said of the company lauded by President Obama that received $535 million in government-backed loan guarantees. (Associated Press)

Mitt Romney campaigns at the shuttered Solyndra plant in Fremont, Calif., on Thursday. "It's a symbol not of success, but of failure," he said of the company lauded by President Obama that received $535 million in government-backed loan guarantees. (Associated Press)