Morrison's testimony is expected to be significant because he is a current White House official whose name was cited 15 times in Taylor's opening statement, which Democrats view as damning for Trump. Morrison also listened to the July 25 call between Trump and the Ukrainian leader, CNN reported earlier this month. His testimony would be the first from someone who heard the call directly. A transcript of the call was released by the White House but was not a full verbatim. But two sources also tell CNN that Morrison will contend that he didn't see anything wrong with what the Trump administration did, while one of the sources said there will be "nuance" over what Morrison intends to say.

Source: CNN October 25, 2019 00:22 UTC