In 2014, Halper met General Michael Flynn and "… was alarmed by the general's apparent closeness with a Russian woman who was also in attendance".[19]
In July 2016, Halper met with Carter Page at a symposium held at Cambridge regarding the upcoming United States election. At the time, Page reportedly did not view the meeting as suspicious.[20]
In August 2016, Halper contacted and met with Trump campaign co-chair Sam Clovis. According to Clovis, Halper did not volunteer to work for the campaign, but offered to share research information.[21]
In September 2016, George Papadopoulos was summoned to England by Halper, who offered to pay him to discuss energy issues involving Turkey, Israel, and Cyprus, which was Papadopoulos' area of expertise.[17][20]
On November 3, 2016, five days before the United States election, Halper was interviewed by Sputnik News and said, "I believe Hillary Clinton would be best for US–UK relations and for relations with the European Union. Clinton is well-known, deeply experienced and predictable. US–UK relations will remain steady regardless of the winner although Clinton will be less disruptive over time."[22]
In December 2016, former MI6 chief Sir Richard Dearlove, Halper, and historian Peter Martland resigned from their positions at the Cambridge Intelligence Seminar (CIS), an academic forum on the Western spy world. Halper said that "unacceptable Russian influence" was the reason for his sudden resignation.[23] The resignations led to the journal Intelligence and Terrorism Studies being shut down. Veruscript, its publisher, dismissed the suggestion and said it is "a serious and wholly unfounded allegation" and went on to say, "The decision was made after a range of spurious and completely unfounded claims were made in UK media about a small sponsorship of under £2,000 of the Cambridge Intelligence Seminars solely to provide marketing funds."[24]