I think the posting by DHS on Wiki was a signal. They could have easily masked that IP address. Of course, it is Dems we are talking about so maybe they were too stupid to mask it.
The fact that McCarthy and Ellmers, who have been members of the Republican Obama enablers club in the House, are publicly exposed by DHS sources for adultery with days of McCarthy's announcement he was running for the House Speaker position, suggests that he may have been being blackmailed over this issue for quite some time but now that McCarthy was a potential Speaker, whoever has been blackmailing him has determined that there is more value in destroying him than in continuing the blackmail.