Clues into how Rep. Adam B. Schiff is secretly running the Democrats’ Ukraine impeachment inquiry are contained in his 2018 Russia report in which he demanded at least 60 more witnesses while venturing down scores of investigative alleys.

Mr. Schiff, in his 99-page dissent to a Republican finding of no Trump-Russia conspiracy, also chastised the majority on the House Permanent Select Committee on Intelligence for holding few public hearings. This is the same complaint Republicans are now lodging against Mr. Schiff. The California Democrat and now committee chairman has held one open hearing as he grills witnesses in private.
“The Majority held only four open hearings during the course of the investigation,” Mr. Schiff and his Democratic colleagues wrote in 2018.
Mr. Schiff is irking Mr. Trump by coming up with more and more figures he wants to interrogate from the White House, the State Department, the Pentagon and the intelligence agencies.