The Dowager Empress of Chappaqua's doomed campaign begins to creak to a close. Veteran Democrat strategist Doug Schoen has the gory details: There is now more than a theoretical chance that Hillary Clinton may not be the Democratic nominee for president. How could that happen, given that her nomination has been considered a sure thing by virtually everyone in the media and in the party itself? Consider the possibilities. The inevitability behind Mrs. Clinton’s nomination will be in large measure eviscerated if she loses the June 7 California primary to Bernie Sanders. That could well happen...A Sanders win in California...