Sanders on worker-owned business

What other candidate is proposing this, an example of the emerging Commons? An excerpt:

"Sanders is serious about this and had previously offered legislation to this effect in 2012, 2009 and previously. In June 2014 Sanders’ website described the plan for legislation he was introducing with Vermont’s Senator Patrick Leahy. He proposed to get the government involved in starting and maintaining worker cooperatives and creating a bank to fund worker ownership."