Melinda French Gates, once known as the quiet and reserved half of one of the world’s most famous couples, has recently taken a bold step into the world of politics. For years, she and her ex-husband, Bill Gates, co-ran the Bill and Melinda Gates Foundation, the largest private philanthropy in the world. They focused on global health, poverty, and education, but Melinda stayed away from politics. She didn’t want to upset governments around the world or get involved in controversial issues. That...