Five-and-a-Half Hours

How’s this for rapid response:

11: 15 a.m.: Clinton campaigne-mails: “NEW AD: Clinton Campaign Unveils New Ad AskingVoters, ‘Who Do You Think Has What it Takes?’ ” [Watch it here .]

4:49 p.m.: Obama campaign e-mails: “AD RESPONSE TO CLINTONFEAR AD” [Watch it here .]

Five-and-a-half hours: All it takes to digest, produce,edit, and hit back with a counter-spot. So this is that 21st Century campaign I’ve been hearing all about. Obama spokesman Bill Burton says the ad will be airing in Pennsylvania.