The top Democrat on the House intelligence committee said on Tuesday that the FBI had been “deeply damaged” by its conduct during the presidential election and would find it hard to repair its credibility under a Trump administration.

Adam Schiff said that FBI leaks about the investigation into Hillary Clinton’s email server – and the announcement by the FBI director, James Comey, 11 days before the vote, that new emails had been found – “were highly problematic, to put it in the most diplomatic of terms”.