Back in the ’90s when she was First Lady, Hillary Clinton wore skirts. A lot. But beginning with her successful run for the Senate in 2000, she began to embrace the pantsuit. Functional, yet projecting power, it was an easy choice for a woman with a busy lifestyle. Throughout her presidential campaign in 2008 and her tenure as Secretary of State, Clinton became synonymous with her outfit of choice. As she celebrates her 65th birthday, we look back at her signature style.