Through both the campaign and his presidency, Obama has made little secret of his disdain for some of the horse-race, tabloid elements of the press corps--though his political and communications staff are not above sometimes exploiting those same tendencies for their own benefit.
I see journalists make this same basic point fairly regularly -- that Obama and his staff may say they don't like the media's focus on politics and process at the expense of policy, but they exploit those tendencies when convenient. (Here, for example.)
If anyone is under the impression that this undermines the criticism of contemporary political journalism, they're mistaken. It isn't inconsistent to think political reporters should focus more on policy and less on gossip and conjecture, and at the same time take advantage of their tendencies when you can. As a former Defense Secretary might say, you make your case to the public through the media you have, not with the media you wish you had.
Nor does it let reporters off the hook. These statements about the White House “exploiting” reporters' tendencies should not be taken to mean that were it not for the White House (or the DNC or the RNC or whoever) egging them on, the Mark Halperins of the world would be writing serious, detailed pieces examining complex public policy questions. They wouldn't be. They aren't being led astray by the people they cover; they are already astray.
(Note: Scherer may or may not be trying to imply any of those things; I can't really tell. Either way, I'm not really talking about him specifically, but about the frequency with which I see asides like that, which suggests that some people must think they mean something. They really don't.)