in 1993, rosenberg oversaw the placement of the first american political party on the internet, putting the dnc on compuserve. rosenberg helped found the congressional caucus the new democrat coalition in 1996. a project he founded and led from 2003 through 2005 eventually became the democracy alliance. rosenberg was a member of the democratic platform committee in 2004, and a leading candidate for chair of the democratic national committee in 2005. he was a high level outside advisor to the obama white house and administration more broadly, working on issues from tpp to immigration reform to economic policy.