Rep. Jason Chaffetz (R-UT) was interviewed today by Fox's Megyn Kelly about the vote scheduled for Thursday on the contempt of Congress resolution for Attorney General Eric Holder. He said that he expects the vote to occur around 5 pm EDT tomorrow and that he sees there is no way of avoiding it.
He acknowledged what we have known or suspected for a long time that the House Oversight and Government Reform Committee already has copies of documents, memos, and emails given them by whistleblowers that implicate the political leaders of the Department of Justice. The purpose of the subpoena is to confirm the authenticity of the documents and allow them to be entered into the record.
The accompanying article estimates that approximately 20 Democrats will also vote to hold Holder in contempt. Other estimates that I've read are as high as 35 so we really won't know until the votes are tallied.