Every minute of every day 3600 images are uploaded to Instagram — that’s over five million pictures in any one twenty four-hour period. There’s little wonder then that Barack Obama has chosen the image sharing site as his preferred battlground in a fervent bid to secure the youth vote. Indeed, the 2012 presidential candidates have all decided that their preferred way to court younger voters is not by visiting schools, clubs and colleges, but by harnessing the undeniable power of social media.