A rare look inside Obama's campaign headquarters

Help

President Obama's campaign for re-election later this year is set to be the most sophisticated ever seen in its use of technology and the internet.

His victory four years ago was seen by some a triumph of social networking techniques but this year's approach will be on much bigger scale in the battle against the Republican Mitt Romney.

The BBC's North America editor Mark Mardell has been given rare access to the Obama campaign headquarters in Chicago.

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.