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Part of his portfolio, but he's got to investigate. again, given this very troubling pattern of trump officials and trump campaign workers lying or conveniently forgetting about their relationship with the russians. >> fascinating. a lot here, and i want to reiterate in our reporting, as richard engel found, there is a paper trail here that raises new questions about wilbur ross, his financial ties back to russia, and whether or not that involves any other illicit allegations of conduct is not on the paper trail disclosed. the question being, will the senate look into it? senator richard blume...

Steven giller is a professor at new york university's law school and one of the nation's leadest experts on legal ethics, and paul buttoner, msnbc analyst and former prosecutor with an expertise in corruption. professor gillers, i go to you first. anyone in law school knows your work as an ethicse expert. ethics is different than crime. walk us through for wilbur ross what you see as the ethical issues in disclosure and what lawyers often focus on, any potential conflict of interest given what are exposed ongoing ties that lead back to russia. >> ethics is different from crime. so it may be th...