Almost certainly Stephen Miller was a target of the operation and not an informant.
He is one of the key pillars of Trump in forming pro-American policies on immigration and trade.
Ultimately, immigration & trade is what is at the base of the attack by Obama, Hillary, the Deep State and the Neocons against Trump.
What kind of country will we be? Will Americans be demographically replaced by mass third world immigration and de-industrialized by massively one-sided trading arrangements the ill effects of which are masked by taking on ever-greater debt until finally a Latin American-style economic crash?
That is the future the left and the neocons want for us.
Stephen Miller and Sessions were targeted.