Daniel Goldman, House Intel Majority Counsel, asked diplomat Bill Taylor, "What did you understand that to mean, to put Zelensky in a public box?"
"I understood that to mean that President Trump, through Ambassador Sondland, was asking for President Zelensky to very publicly commit to these investigations, that it was not sufficient to do this in private, that this needed to be a very public statement."
Asked by Goldman why it needed to be in public as opposed to a private confirmation, Taylor said he had "no further information on that."
More context: In his opening statement, Taylor said Sondland said on a September 1 call that "everything was dependent, including security assistance" on a public announcement by Ukrainian president Volodymyr Zelensky of investigations of Burisma and the alleged interference of the 2016 election.
Sondland added, according to Taylor, that President Trump wanted Zelensky "in a public box by making a public statement about ordering such investigations."