With the Romney campaign aggressively pushing back against reports that the candidate’s tenure at Bain Capital lasted longer than he once claimed, one 2000 document filed by Romney could prove particularly difficult to explain away. Among other things the Jan. 3 2000 SEC filing says, “W. Mitt Romney is principally engaged in the business of serving as sole stockholder of BCI VI, Inc. (Bain Capital Investors VI)” — and it contains his signature. That stands in contrast with various financial disclosure forms filed by Romney in recent years claiming that he left the company entirely to run the Salt Lake City Olympics in 1999. H/T James Carter, who sent the document to BuzzFeed.