Few candidates in history have had Mrs. Clinton's prepping for such challenges. As a senator from New York, she was more effective at legislating than Sen. Sanders was, The Washington Post says. As secretary of state, she secured the tough sanctions against Iran that eventually led the dismantling of much of its nuclear program. While first lady, she shrugged off the failure of her health-care-for-all plan in 1993 and set about helping to get millions of poor children coverage.