(This question comes with a PPT;)
We normally see blogging as a two-way interaction, in which the blogger creates the content and the readers interact or challenge the author.
But the case will be much difficult when it comes to government, such as the White House. Because people will become coarser and rude online, especially in the comment area. Hence the governor blog may go wild and chaotic. So the government will have to administrate the comment.
Once the government starts administrating the comment, citizens may find the government manipulating what should be said and what should be shown, which contradicts the original intention.