In an oddly ironic twist, today Donald Trump announced that he has picked as chairman of his newly launched fundraising operation none other than a former employee of the bank he has repeatedly criticized in the past, and which he used as a foil to criticize Ted Cruz: Goldman Sachs. Trump announced that heading up his own personal fundraising operation as national finance chairman will be Steven Mnuchin, a long-time business associate, chairman and CEO of the hedge fund Dune Capital. More importantly, however, he spent 17 years at Goldman Sachs where he was most recently a Partner, having built...