US Sen. Maria E. Cantwell (D-Wash.) probably recognized that the bill she introduced on Nov. 10 with Ronald L. Wyden (D-Ore.) and Bernard Sanders (I-Vt.) has little chance of being considered. Congress appears unlikely to let state regulators and attorneys general consider regulating over-the-counter financial derivatives trading as a form of gambling.Cantwell wanted to make a point. "The derivatives market has done so much damage to our economy and is nothing more than a very high-stakes casino—except that casinos have to abide by regulations," she said."Even in Las Vegas at the blackjack tables, both the house and the player have to have capital behind their bets,&q...