done testifying focusing on the origins of the investigation. the chairman of the senate judiciary committee this morning made it very clear he wants to do a deep dive into what happened in the start of this russia probe. and i asked him about bringing in bob mueller if it would reshape the dynamic in his view in any way, and he said no. he made it clear that mueller will not be coming before his committee. >> it won't reshape my dynamic. i've heard all i need to hear from mueller. i've read the report and i accept tp findings. i don't think it's going to change public opinion. having been involved in the clinton impeachment, if the public is not with you you'll pay a price. and i don't think there's anything mueller is going to say that's going to change anybody's mind. >> why don't you want to bring him before your committee to ask him questions? >> i've heard everything i want to hear. >> reporter: but on the house side the preparations are intensifying. they're having a mock hearing to talk and go over their strategy for the hearing tomorrow.