I f you write long enough about a great politician, you’re bound to arrive at a moment that feels like a fitting epilogue to the story. I think of Ted Kennedy rallying from brain surgery to deliver one last stirring convention speech in 2008. Or a dying John McCain flashing a defiant thumbs-down in the well of the Senate. Or maybe Rudy Giuliani delivering a last cringey monologue with hair dye streaming down his face. So it may be when Bill Clinton , slowed and shrunken by age, returns to the