Here’s what gave me joy during the first presidential debate: Hillary Clinton’s smile. Sure, she might’ve practiced in front of the mirror, and I don’t fault her for that. As she told Donald Trump, she believes in preparing, both for the debates and for being president. But what her smile signaled so effectively was something else, something I would call her new imperfectionism. It’s no wonder she looked so joyful: if you’re Hillary Clinton, it must be a great relief to have moved beyond the futile grind of flat-out perfectionism. And I think we women can all learn from her. I’m not arguing that she was not brilliant that night. She was. But her tone, her ease, and best of all that bemused, transcendent smile told me that not only is she confident and ready to govern, she is now beyond inured to the type of male posturing in which Donald Trump invests all of his strategic energy. This is an important trait in a first female president. It is one she has honed over the decades, especially as Secretary of State. While Trump has been sharpening his negotiating skills by belittling tenants, employees, contractors, and beauty pageant winners, Clinton has been steadily building her ability to hold her own with hard-to-handle men, from her husband to five-star generals to heads of state. Remember when she was first lady, and she baked those cookies just to show she could? That was perfectionist Hillary, responding to a media pile-on that was all about how uncomfortable the country [...]