Intel chiefs presented Trump with claims of Russian efforts to compromise him The allegations were presented in a two-page synopsis that was appended to a report on Russian interference in the 2016 election. The allegations came, in part, from memos compiled by a former British intelligence operative, whose past work US intelligence officials consider credible. The FBI is investigating the credibility and accuracy of these allegations, which are based primarily on information from Russian sources, but has not confirmed many essential details in the memos about Mr. Trump. The classified briefings last week were presented by four of the senior-most US intelligence chiefs -- Director of National Intelligence James Clapper, FBI Director James Comey, CIA Director John Brennan, and NSA Director Admiral Mike Rogers. One reason the nation's intelligence chiefs took the extraordinary step of including the synopsis in the briefing documents was to make the President-elect aware that such allegations involving him are circulating among intelligence agencies, senior members of Congress and other government officials in Washington, multiple sources tell CNN. The two-page synopsis also included allegations that there was a continuing exchange of information during the campaign between Trump surrogates and intermediaries for the Russian government, according to two national security officials. It is worth noting that the allegations did not originate with U.S. sources, but rather with agents in MI6. This is exactly what I intimated this past weekend.