The core questions are: Who tasked Halper, a former University of Cambridge professor, with contacting Trump campaign advisers Carter Page, Sam Clovis, and George Papadopoulos? What did they tell Halper, and what did he in turn tell his FBI/CIA handlers? And how was that information used by government officials in their investigation of possible Russian meddling in the 2016 election? Was Halper a credible source?

Carter Page holds the key to many of those questions.