For nearly one year, Wisconsin Rep. Sean Duffy has been Janet Yellen's nemesis over the ongoing probe into Fed leakage of material inside information via Medley Global and any other undisclosed channels, one which has seen subpoeans be lobbed at the Fed which has been doing everything in its power to stall said probe, and which cost Pedro da Costa his job when he dared to ask questions at a Fed presser that were not precleared by his WSJ "Fed mouthpiece" peers. Today, during Yellen's appearance before the House Financial Services committee, Duffy finally had enough, and in a heated...