I don’t think so. He tends to be somewhat independent of mainstream Dem thinking.
Koch, a Democrat who campaigned in Florida for George W. Bush in 2004, said he wants Obama to shift his stance on the Iran issue.
"We should say that an attack upon Israel is an attack upon the United States and that we will militarily respond," he said. "That is a very key statement in my judgment."
http://www.newsmax.com/Newsfront/koch-obama-trust-democrats/2012/09/23/id/457290
On the aaron klein show he specifically stated that he didn’t have a problem with obama, and spoke on behalf of him to his jewish bretheren.