At 2300 GMT (I think that's midnight current UK time (BST)) tonight, CNN will be screening live its Democratic Party CNN/YouTube debate. For the last few weeks, CNN has been asking users to submit video questions to the candidates via video-sharing site YouTube. A number of video questions will then be selected and played to each of the Democratic Party presidential candidates, who will then answer.

We did something similar with Tony Blair in April - we had a journalist ask YouTube users to submit questions to the Prime Minister. Two weeks later, he answered some of those questions in an hour-long interview with the same journalist. It worked very well, and had a lot of hits.

I think this is a great way to get disengaged people involved in political processes. It's sounding a bit cliché, but it is actually true: you go to the audience and they'll engage with you, expect them to come to you and forget about it.

Watch a tour of the debate set below, and tune in at 2300 GMT:

Labels: CNN, Democrats, US elections, YouTube