Page’s presence in the campaign facilitated the FISA Title 1 Surveillance-wiretapping- and e-mail grabs, Halper achieved nothing.
Halper has been on the US Government payroll as a research firm for years and years.
And a critical fact is: Halper was on the spying job for Brennan long before it was an official inquiry dating back to March 2016. So a paid contractor was making connections between Mifsud, Alexander Downer and Carter Page.
A great article which has the timeline:
Ties That Bind – Stefan Halper, Joseph Mifsud & Alexander Downer (& Papadopoulos)
https://www.themarketswork.com/2018/05/10/ties-that-bind-stefan-halper-joseph-mifsud-alexander-downer-papadopoulos/
Stefan Halper approached Papadopolos out of the blue in September 2016 but the FBI didn't interview him until January 2017, six months after he supposedly triggered a counterintelligence investigation in July 2016.
The Alexander Downer meeting was arranged, not accidental.
Carter Page was invited to a symposium by Halper in London just a few days after he returned from the Moscow trip and met with Halper personally.
UK Intelligence agencies and private intelligence contractors are dripping from Halper and his cronies.
Two key facts: Halper is dirty with the UK intelligence community and Halper was a US Government contractor working for Obummer (and the Hillary campaign) long before the "EC" was actually penned initiating the counterintelligence investigation. The "EC" that Devin Nunes wants and DOJ/FBI doesn't want to give up likely exposes those facts and Halper's contribution.