department. when he makes these statements, they can't be taken lightly by michael cohen or other witnesses. now we have to assure his safety and bring him in voluntarily. >> walk us through, tell us a little bit about other individuals that you and your committee are interested to hear from regarding this subject and the other ngss that we outlined. >> there is a lot of issues that the oversight committee be looking into. there are topics ranging from campaign contribution violations. there are other witnesses that mr. cohen would probably tell us about, and i would suspect they would then be called in for further questioning. >> how do you ensure that what your committee is doing now in the way you're launching these