the january 6 committee is preparing for what could be a subpoena battle. the committee is preparing a narrow set of legal and tactical options as they brace for trump allies to invoke a wide range of constitutional protections to avoid testifying. let's bring in melissa murray and professor of law at nyu. melissa, welcome. let's get into this. does the committee really have the power to force trump's allies to testify? if so, how would they go about it? could they file criminal complaints against them? >> this idea of criminal referrals suggest they will be referring this to some kind of prosecutory group. it's unclear whether congress