The new advertisement from the Obama campaign takes direct aim at Mitt Romney’s Bain Capital, with the story of GST Steel — a company laid waste by Bain’s predatory business practices.

The right wing already has their talking point ready to go for this story: Romney left Bain Capital before GST Steel declared bankruptcy.

But while this is true, it doesn’t come close to telling the whole story: Retirement Deal Keeps Bain Money Flowing to Romney.

Almost 13 years ago, Mitt Romney left Bain Capital, the successful private equity firm he had helped start, and moved to Utah to rescue the Salt Lake City Olympic Games and begin a second career in public life.

Yet when it came to his considerable personal wealth, Mr. Romney never really left Bain.

In what would be the final deal of his private equity career, he negotiated a retirement agreement with his former partners that has paid him a share of Bain’s profits ever since, bringing the Romney family millions of dollars in income each year and bolstering the fortune that has helped finance Mr. Romney’s political aspirations.

The arrangement allowed Mr. Romney to pursue his career in public life while enjoying much of the financial upside of being a Bain partner as the company grew into a global investing behemoth.

In the process, Bain continued to buy and restructure companies, potentially leaving Mr. Romney exposed to further criticism that he has grown wealthier over the last decade partly as a result of layoffs. Moreover, much of his income from the arrangement has probably qualified for a lower tax rate than ordinary income under a tax provision favorable to hedge fund and private equity managers, which has become a point of contention in the battle over economic inequality.

(h/t: Gus.)