Senator and Democratic presidential candidate Hillary Clinton has unveiled her economic vision. Should she be given the power to implement it, we can say goodbye to the prosperity and opportunity we have enjoyed since the Reagan years. In a speech at Manchester School of Technology in New Hampshire, Mrs. Clinton said it's time to replace President Bush's "ownership society," which she called an "on your own" society, with one based on shared responsibility and prosperity. Mrs. Clinton said she prefers a "we're all in it together" society: "I believe our government can once again work for all Americans. It can...