Just as Democrats in Congress were congratulating themselves on turning back Social Security reform, a new proposal has dramatically changed the debate. The DeMint-Ryan plan, if passed into law, would mark a giant first step toward personal ownership of Social Security benefits. Moreover, it addresses the Democrats' main objections to personal accounts. We will now see, in other words, whether congressional Democrats have been debating the issue in good faith, or whether they have ulterior motives. Announced last week by Sen. Jim DeMint, along with several influential House Republicans, the plan is based on the radical idea that our Social...