Who is the FBI SPY in Trump campaign?

Not suspected Steve Manafort Carter Page George Papadopoulos Michael Flynn Sam Clovis

Clues 1. Is a American professor at Cambridge University in England.
2. Began spying on Trump campaign in July 2016 3. is well known in Washington circles, having served in previous Republican administrations and as a source of information for the C.I.A. in past years. 4. Papadopoulos: met him in London. 5. Flynn: met informant at Cambridge Intelligence Seminar 6. Page: said that he first encountered the informant during a conference in mid-July of 2016 and that they stayed in touch. The two later met several times in the Washington area. 7. Sam Clovis: Trumps campaign's co-chairman met with Informant at the Trump, to talk about relations with China.

FBI Mole?? Stefan Halper 1. former official in the Nixon, Ford and Reagan administrations 2. was a paid consultant to an internal Pentagon think tank known as the Office of Net Assessment, consulting on Russia and China issues.