He is a fact witness, because of the contact with the whistleblower with him/staff and his lies about it.

.@RepAdamSchiff indicates he wouldn’t testify if Republicans subpoena him: "There is nothing to testify about … if they go down this road, it shows a fundamental lack of seriousness. A willingness to try to turn this into a circus." pic.twitter.com/SiLcUf6a8P

— Tom Elliott (@tomselliott) November 24, 2019