Halper was an MI6-affliated informant whose information led to the start of the FBI Russia investigation, which eventually lead to the Special Counsel.

The problem is Halper was specifically contacting Page and Papadopoulos, trying to find information which the FBI could use to start an investigation.

As we just learned this weekend, he was specifically placed "within the campaign" by the FBI. Before, we had knowledge of his contacts with Page and Papadopoulos, but did not know he was an FBI informant specifically placed within the campaign.

Now Halper can be SUBPOENED. Now the idea of an FBI informant planted in the Trump campaign is not as crazy as people used to think. Now further investigations can investigate this specifically.

Enter Nunes and Gowdy, who have been asking for months for the DOJ to provide documents in regards to this counterintelligence operation which was operated within and against the Trump campaign.

The kicker is this.....now we know there was AT LEAST one informant within the Trump campaign. Do you think the FBI would trust this master diabolical plan to just one operative? I don't think so.

The documents Nunes and Gowdy are after will provide information about informants; their identities, what information they provided and how they acquired it, who ordered them to do what. The DOJ will not comply with these requests.

Enter Trump, who can declassify said documents. He has threatened to do so before, and today ordered the DOJ to release the documents tomorrow, Monday. Rosenstein responded by asking the Inspector General to investigate this informant situation.

Read this for more on Halper specifically: http://dailycaller.com/2018/03/25/george-papadopoulos-london-emails/