Tonight’s debate on CNN for the Democratic presidential hopefuls was a big step forward for the way campaigns are covered. The producers deserve a lot of credit for the innovative format they introduced. The videos they chose were terrific: authentic(-seeming, anyway) voices from ordinary voters speaking directly to candidates. The final video, about “the candidate to your left,” was a brilliant parting shot. The effect was at once to empower voters and to render more human the candidates. I loved it. Well done, CNN and YouTube/Google.