The line on Teresa Heinz Kerry, heiress of the Heinz ketchup fortune and wife of the presumptive Democratic nominee for president, is that she's a woman of principle, a hear-me-roar dame who tells it like it is. Well, that's her line, anyway. "At my age I'm entitled to have strong beliefs," the 65-year-old recently told Vogue. "I'd be a ninny if I didn't." She's not alone in this estimation. Democrats desperate to jumpstart her husband's lackluster presidential campaign have also embraced Heinz Kerry's flinty frankness. Their hope is that she'll spark that part of the electorate cool to Kerry but...