Last week, in an article for Vanity Fair, "that woman," Monica Lewinsky, forced Bill, Hill and the rest of us to take a look back. The real scandal, says Gene Healy, is that our system makes it far too hard to remove a president. Our presidential system of government lacks important "safety valves" present in parliamentary regimes. The president's fixed term makes it nearly impossible to remove him. We manage fewer than one presidential impeachment per century, and in 225 years, the Senate has never successfully removed one.