Last September 2018, HPSCI Republican Chairman Devin Nunes asked the DOJ to review, for declassification purposes, all witness transcripts and release them to the public. {link} However, the DOJ and FBI refused to release the transcripts. Three months later, December 2018, the joint Oversight and Judiciary Committee also requested their witness transcripts from their committee be released {link}. Both requests were denied.

Today, instead of supporting a public release, the new Democrat HPSCI Chairman, Adam Schiff, announces he will send Robert Mueller all witness transcripts.
WASHINGTON (Reuters) – The House Intelligence Committee will release all transcripts of interviews in its probe of Russian election interference to the special counsel’s office, its Democratic chairman said on Friday after Roger Stone, a longtime ally of President Donald Trump, was charged with lying to Congress.



