Bernie Sanders says he can beat Hillary

In a sweeping interview Sunday on CBS's 'Face the Nation,' Vermont Senator and 2016 hopeful Bernie Sanders defiantly told Bob Schieffer that he can beat Hillary Clinton.

"The answer is yes," Sanders responded to Schieffer's questioning if the senator "really" thought he could pull it off. 

Sanders cited "massive dissatisfaction" with "corporate establishment and the greed of corporate America" as the major reason voters would turn to him over Hillary. 

The senator, who called himself "the most progressive member of the United States Senate," positioned himself to the left of Clinton on a whole host of issues including campaign finance, foreign policy and climate change. 

Related: Sanders on Clinton's challengers

In a surprise move this week, Clinton warmly embraced the involvement of super PAC Priorities USA in her run for president. Sanders, on the other hand, says he won't involve any outside groups in his campaign.

"I understand where she's coming from," Sanders said, but, "I will not have a super PAC." He went on to make the case that the Bernie Sanders campaign doesn't need the additional money, " ... since [I announced] we have had close to 90,000 contributions ... I don't think we're going to outspend Hillary Clinton or Jeb Bush or anybody else, but I think we are gonna raise the kind of money we need to run a strong and winning campaign."

On foreign policy, Sanders hearkened back to the 2002 Iraq Resolution, saying "Hillary Clinton voted for the war in Iraq, I voted against it. Not only did I vote against it, I helped lead the effort against what I knew would be a disaster."

And on climate change, Sanders told CBS, "I have helped lead the effort against the Keystone Pipeline. I'm not quite sure that Hillary Clinton has come out with a position about that."