In his August 2019 discussion with Mr. Bolton, the president appeared focused on the theories Mr. Giuliani had shared with him, replying to Mr. Bolton’s question that he preferred sending no assistance to Ukraine until officials had turned over all materials they had about the Russia investigation that related to Mr. Biden and supporters of Mrs. Clinton in Ukraine.

The president often hits at multiple opponents in his harangues, and he frequently lumps together the law enforcement officials who conducted the Russia inquiry with Democrats and other perceived enemies, as he appeared to do in speaking to Mr. Bolton.

Mr. Bolton also described other key moments in the pressure campaign, including Mr. Pompeo’s private acknowledgment to him last spring that Mr. Giuliani’s claims about Ms. Yovanovitch had no basis and that Mr. Giuliani may have wanted her removed because she might have been targeting his clients who had dealings in Ukraine as she sought to fight corruption.