You're John Kerry, and this is the worst weekend of your life. This is the moment when you should be preparing to take the oath of office, trying to figure out how to say, ``So help me God,'' without choking on that last word the way all good Massachusetts liberals do. You've been globe-trotting for weeks now, bad-mouthing your own country in Third World hellholes, but now you know Joe Louis was right. You can run but you can't hide. As Hosni Mubarak told you in Cairo, ``You don't have to go home, Senator, but you can't stay here.'' You're...