“It was something along the lines of, ‘I hope you can conclude this as quickly as possible,’” Mr. Burr said. He said he replied to Mr. Trump that “when we have exhausted everybody we need to talk to, we will finish.”…

Senator Dianne Feinstein, a California Democrat who is a former chairwoman of the intelligence committee, said in an interview this week that Mr. Trump’s requests were “inappropriate” and represented a breach of the separation of powers.

“It is pressure that should never be brought to bear by an official when the legislative branch is in the process of an investigation,” Ms. Feinstein said.