Two years ago, Minnesota Republican Michele Bachmann made one of her first impressions on the national consciousness by railing against what she said was an Obama administration plan to replace the dollar with a global currency. The argument was a bit of misdirection — there’s never been any discussion of replacing the dollar domestically. But there was talk in those days, encouraged by the administration, of elevating the role of the International Monetary Fund’s special drawing rights to supplement and possibly supplant the dollar as the world’s reserve currency.