Top Democrat says intelligence briefing cancelled after attacks by far-right Laura Loomer

Mark Warner says officials rescinded invitation because of campaign of baseless attacks' by extremist Trump backer

Senator Mark Warner said on Wednesday that a meeting he had scheduled at the headquarters of a US intelligence agency was cancelled following online attacks by the far-right activist and conspiracy theorist Laura Loomer.

Warner, the Democratic vice-chair of the Senate intelligence committee, was set to visit the National Geospatial-Intelligence Agency in Virginia in what he described part of his responsibility to provide oversight and support to our intelligence community".