She was offered a job as a senior speechwriter for then-Senator Barack Obama on his presidential campaign days after Clinton conceded. Her first assignment for Michelle Obama was to work with her on her address to the 2008 Democratic National Convention. She also wrote Mrs. Obama's speeches at the 2012 and 2016 Democratic National Conventions. After a couple of years as a senior speechwriter for President Obama, Hurwitz became Chief Speechwriter for First Lady Michelle Obama and also worked on policy issues affecting young women and girls as a senior advisor to the White House Council on Women and Girls. After leaving the White House in 2017, she served as a Fellow at the Institute of Politics at Harvard University.