It took Senator Jon S. Corzine two decades to work his way to the top of Goldman Sachs and accumulate company shares that in 2001 were valued at $270 million. But now, all that he has left in the company is - well, nothing. On Tuesday, Mr. Corzine's campaign revealed that he had completed his divestiture of his Goldman Sachs holdings. And while it was not clear when the last of the holdings was sold, Tom Shea, a senior campaign adviser, said the sale was probably completed this year, because Mr. Corzine did not list it on his 2004 tax...