The reasons for Hillary Clinton's resignation are largely speculative, but she is quoted as saying that she wanted to relax, according to Karen Lickteig from Mic. Lickteig claims that Clinton resigned to prepare for her 2016 presidential campaign, and quotes Bill Clinton advising his wife to get some rest and decide what she wants to do with the rest of her life when commenting about her potential run in 2016.
Hillary Rodham Clinton served as the Secretary of State under President Barack Obama from 2009 to 2013. President Obama announced Clinton as his nominee on December 1, 2008. Before taking office as Secretary of State, she was conflicted, stating "You've seen what this is like; it will be a circus if I take this job." She was the first former First Lady to become Secretary of State in the history of the United States. She was succeeded by John Kerry when she formally resigned on February 1, 2013.
During her tenure, Clinton pushed for a larger international affairs budget and an expanded role in global economic issues. In July 2009, Clinton announced the Quadrennial Diplomacy and Development Review, an initiative to establish specific objectives for the State Department's diplomatic missions abroad. Clinton traveled over 1 million miles during her tenure. In February 2009, she took her first trip as secretary to Asia, and visited Japan, Indonesia, South Korea and China.