'It wouldn't matter': Former federal prosecutor on calling Pence, Pompeo and others to publicly testify in impeachment hearings

Former federal prosecutor Peter R. Zeidenberg joins Yahoo News Editor in Chief Daniel Klaidman and Chief Investigative Correspondent Michael Isikoff to discuss the merits of calling additional witnesses — including Vice President Mike Pence, former national security adviser John Bolton and Secretary of State Mike Pompeo — to publicly testify in the impeachment inquiry into President Trump.