10 of 11 Getty Images

Hillary Rodham Clinton: She ruffled feathers when she took such a significant role as First Lady in championing health care reform, saying in 1992 that she refused to bake cookies while her husband was president. But her 'rebellious' streak was evident as far back as her college years, when in 1968, following Martin Luther King's assassination, she organised a two-day student strike at Wellesley College. After being elected student president she became the first student in the College's history to deliver its commencement address in 1969. In it, she criticised Senator Edward Brooke, who had spoken before her at the commencement about it being foolish to demand social change outside of congress. Hillary responded 'for too long our leaders have used politics as the art of the possible. And the challenge is to practice politics as the art of making what appears impossible, the possible.'