The Politico.com is an online newssite that has set out to assemble the most talented and interesting collection of journalists it could find to report on one subject: national politics. Begun in January 2007, it focuses on three arenas: The first is Congress and the constant flow of agendas, personalities and power struggles that define daily life on Capitol Hill. The second is the 2008 presidential campaign, a race already churning and one likely to shape history in ways far beyond the typical election. The third is lobbying and advocacy, a part of the capital economy undergoing rapid growth and change.