Intelligence agencies concluded in early 2017 that President Vladimir Putin ordered "an influence campaign" aimed at helping the Trump campaign and harming his Democratic opponent Hillary Clinton.
Nielsen said: "I haven't seen any evidence that the attempts to interfere in our election infrastructure was to favor a particular party."
And yet Nielsen still says she stands behind the intelligence agencies' assessment that Russia meddled in the election. She added that Russia's influence operations were aimed at causing chaos on both sides.
Nielsen spoke Thursday at the Aspen Security Forum in Colorado.
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