The intended donors are five years away from being able to cast a vote, but Barack Obama's campaign team is hoping to enlist the support of barmitzvah boys across the United States.

On the president's official re-election website, supporters are asked whether they have "a special milestone or event coming up?".

"Instead of another gift card you'll forget to use, ask your friends and family for something that will go a little further: a donation to Obama for America," the website suggests. "Register your next celebration-whether it's a birthday, bar or bat mitzvah, wedding, or anniversary-with the Obama campaign".

The Obama Event Registry has, predictably, sparked criticism among right wing bloggers.

As one commented: "Thirteen. I imagine that 'Tooth Fairies for Obama' is right around the corner."