trump's tax returns. those were obtained in february after a subpoena was obtained. >> joining us now, elie honig. what is this special grant jury and what power does it have? >> the grand jury is one of the most powerful tools any prosecutor can have. despite its name it does not have much in common with a trial jury. one of the things they do have in common, they're both selected ran randomly. now, this jury will be sitting for six months. that's what makes it a special grand jury. usually grand jury's sit for one months. this one is going to be impanelled for up to six months. it could end earlier than that or the prosecutor could ask for permission to extend beyond that. that's a good ballpark figure for how long this might take. the grand jury operates in secret. we will not know what's