From the Instagram blog:
We’re excited to welcome President Barack Obama to Instagram! We look forward to seeing how President Obama uses Instagram to give folks a visual sense of what happens in the everyday life of the President of the United States. In addition to sharing photos through the @barackobama Instagram account, the Obama 2012 staff is asking supporters to share their photos from the campaign trail with the tag #obama2012.
His account is run by staff of the Obama 2012 campaign, and so far there are three pictures up--and all of them are using the funky Instagram photo filters. Neat-o.