We wrote earlier about the recent move by bankers — and the politicians who serve them — to unreform the derivatives market, to return it to its pre–Dodd-Frank, pre–Crash-of-2007 state. This is a serious move by banks and bank lobbyists, and it could well happen soon. The seven bills in the House package of “tweaks” — as the House Agriculture website dishonestly puts it — have cleared the committee with Democratic support and are headed to the House floor. In the meantime, there are companion bills in the Senate. What will happen in the Senate? Well, Dick Durbin (always an...