Is Soros (or someone connected to him) manipulating the Presidential futures contracts ?

Donald Luskin has a post where he claims that Soros is trading in futures contracts to try convincing people that Bush won't win. Well, I guess if the Democratic Party is willing to openly try manipulating the online polls right after the debates, this is not much different. Hopefully, Soros will lose a few more dollars betting the wrong way. It makes me want to get into the betting.