Obama himself had stepped into the controversy a few hours earlier, citing the inconsistencies over the date of Romney's departure from the firm and allegations that it had invested in firms that outsourced jobs to low-wage nations overseas. Some Security and Exchange Commission documents have surfaced suggesting Romney played an active role through 2002.
"Ultimately, I think, Mr. Romney is going to have to answer those questions because if he aspires to being president, one of the things you learn is you're ultimately responsible for the conduct of your operations," the president said in an interview with WJLA-TV as he campaigned across the battleground state of Virginia.
Romney said that was "Chicago-style politics at its worst," and an attempt by the president and his campaign to detract from the persistently sluggish economy and unemployment that has been over 8 percent for more than 40 months.
One Romney aide said earlier in the week that any suggestion that Romney had shipped jobs overseas was a lie, and the campaign has said repeatedly the break with the private equity firm came in 1999.
Yet documents surfaced for the second straight day that seemed to indicate Romney played an active management role in Bain Capital after that date, when he says he and company officials say he left the firm to become head of the Olympic Games in Salt Lake City.
Beyond raising questions about Romney's truthfulness, the discrepancy in dates may be important because of accusations that Bain invested in companies that outsourced jobs overseas after 1999.
Documents filed with the federal government by Bain Capital conflict with Romney's statements about when he gave up control of the Boston-based firm.
The filings with the Securities and Exchange Commission place Romney in charge of Bain Capital from 1999 to 2001, the period in which it outsourced jobs and ran companies that fell into bankruptcy.
Separately, Bain Capital issued a statement saying that Romney "remained the sole stockholder for a time while formal ownership was being documented and transferred to the group of partners who took over management of the firm in 1999."