Tens of thousands of people are expected to descend on Washington today for the first major abortion-rights march in more than a decade. With chants and placards, they will warn that Roe v. Wade is at risk. Most Americans have heard this alarm so many times that they've tuned it out. They can't imagine going back to a world in which women's medical records are introduced at trials of doctors to determine whether the abortions they performed were necessary. Advertisement But that world is already upon us. For months, in federal courts in several states, abortion has literally been on...