In trying to determine who the leaker is, one alternative is that there was a political motivation. I can't be certain about that because I obviously don't know who the leaker is. At this point, as far as we know, nobody knows who the leaker is. Certainly that would be a possible motivation.
It has been striking, throughout the process, however, how the information flow was managed. I assume it was not dripped out to the news media or to the various reporters who had the information, but that it flowed over a shorter period of time. However, has been very carefully dripped out to keep the story going as much as anything, perhaps. The idea of political motivation is hard to avoid.