From Lawfare:

Central to the Times story were transcripts of former FBI General Counsel James Baker’s closed testimony before the House Judiciary and Oversight Committees, which have now been publicly released. As Baker put it in that interview, “[N]ot only would it be an issue about obstructing an investigation, but the obstruction itself would hurt our ability to figure out what the Russians had done, and that … would be the threat to the national security.”