they sent in november were not legally valid because they were issued before the full house authorized an impeachment inquiry in december. joining me now to discuss is cnn legal analyst norm eisen. what do you make of this argument by hunter biden's team that the subpoenas issued before the impeachment investigation was officially open into president biden are invalid and do you see this as a delay tactic given that a new subpoena can then be issued now? >> the subpoenas do have significant legal questions swirling around them and that is because of a legal opinion issued by none other than donald trump's department of justice when i was working on the first impeachment of the former president, there was a similar timing issue and the department