The Obama campaign has released a new ad holding Mitt Romney responsible for the loss of 750 jobs in the bankruptcy of a steel plant purchased by Romney’s Bain Capital in 1993. The ad, which will play in several key states, is accompanied by a new Obama campaign website, romneyeconomics.com, which tells the story of GST Steel, a Kansas City firm that went under in 2001, not long after Romney left Bain.

“I worked hard all my life and played by the rules, and they allowed this to happen,” the site quotes one steelworker saying.  (The site relies mostly on media reports to tell the GST story.)