The presidential campaign of Barack Obama during the 2008 elections sparked new discussion about the public engagement issue in the political processes. The campaign used Web 2.0 tools intensively to reach the general public and seek support and collect feedback from voters. In this paper, we analyze the major website of this project, “Organizing for America” (OFA) from the perspective of e-participation, which is a concept that include all the processes of public involvement via information and communication technologies.