AP Photo/John MinchilloSen. Bernie Sanders (I-Vermont) fired off a fund-raising solicitation on Thursday based on a recent interview in which Goldman Sachs CEO Lloyd Blankfein discussed Sanders' campaign. "Make a $3 contribution today to say you have had ENOUGH of Lloyd Blankfein and the billionaire class buying up candidates and elections in this country," Sanders wrote to his supporters. During a Wednesday interview on CNBC's "Squawk Box," Blankfein was asked about Sanders' criticism of him.