The Obama family lived on Chicago's South Side, where Barack taught at the University of Chicago Law School. He was elected to the state senate in 1996, and to the US Senate in 2004. They chose to keep their residence in Chicago after Barack's election rather than to move to Washington, DC, as they felt it was better for their daughters. Throughout her husband's 2008 campaign for US President, Michelle Obama made a "commitment to be away overnight only once a week – to campaign only two days a week and be home by the end of the second day" for their two daughters.