25/ McB:
Bove shows email from Costello that he marked "atty-client privilege," then transitions to discuss the "backchannel"—a word 1st used by Giuliani, who gave the reason that Cohen didn't want this to be public.
Hoffinger has lobbed a few objections, most sustained, and mostly based on hearsay from what I can guess. Costello keeps saying "Giuliani said this" or "Giuliani said that." Another objection now, beyond the scope—sustained—Bove says this was inquired about on cross—sustained.