The idea portal for President Obama's Citizen's Briefing Book was developed by the White House Office of Digital Strategy. This initiative was part of a broader effort to engage citizens in the policymaking process by allowing them to submit and vote on ideas. The Citizen's Briefing Book aimed to gather the most popular suggestions from the public, which could then be presented to the President and his administration.

This platform was launched in 2009, and it was a significant step in leveraging technology and social media to foster public participation in governance. The initiative reflected President Obama's commitment to transparency and citizen engagement during his administration.

For more detailed information, you can refer to the official White House archives or articles discussing the Citizen's Briefing Book initiative.