Trump and more than a dozen of his associates had more than 100 contacts with Russian nationals and WikiLeaks, or their intermediaries, during the campaign and transition. These included multiple offers of dirt on Mrs. Clinton, attempts to arrange “back-channel” meetings between Mr. Trump and President Vladimir V. Putin of Russia, and private messages with WikiLeaks and other Russian fronts. At least 10 other advisers were told about these interactions but did not have any themselves.
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