One of the most ridiculous practices of the campaign press corps is agreeing to let campaigns, already on the record, to edit their quotes after the fact:
Last week, The New York Times revealed that “quote approval” has become standard practice when reporters deal with both the Obama and Romney campaigns as well as with the Obama administration. The way it works is that a reporter interviews an official, then submits the quotes she intends to use in her stories back to the campaign, which only appear if the campaign approves them. Not only that, the campaign often edits the quotes to make them more to their liking.
source: The Power of Shame.
This is actually a both sides do it problem.