The White House is blaming Soros? Holy crap. There's a can of worms when the administration openly speculates like that.
However, they have every reason to blame Soros for a lot of things. For a good, scary read, try "The Vast Left-Wing Conspiracy" by Byron York. If you want the facts on the left-wing, that's the best source I've ever read. It is also scary in that Soros paid in more than $20 million in his attempt to unseat Bush and elect Kerry and he nearly pulled it off with the help of the many leftists organizations like Moveon, Moore, the Hollyweirds etc..