In addition to being Executive Director of 100% Democracy, Miles is a Senior Practice Fellow in American Democracy at the Ash Center of the Harvard Kennedy School. He is the co-author, with Washington Post columnist E.J. Dionne, of 100% Democracy: The Case for Universal Voting, published last year by the New Press. He was president of Dēmos from 2001 to 2014, and president of Common Cause from 2014 to 2016. He served five terms in the Connecticut House of Representatives (1984 - 1994), chairing the committee on elections. He was also Connecticut Secretary of the State from 1995 to 1998, leading multiple initiatives to expand voting and participation.