And because he knows the courts have understood immigration to be the province of the president but doesn't care. His is pure political grandstanding in the matter, to make himself popular with people like Ben Sasse.
From the story here:
A judge recently blocked Doe's attempt to subpoena his female accuser's text messages on grounds that re-litigating the matter "would impose emotional and psychological trauma" on her.
Consider the implications of this decision. According to Seattle District Judge James Robart, a student who believes Amherst violated his due process rights, wrongfully expelled him, and ignored subsequent evidence that his accuser, "Sandra Jones," was the actual violator of the college's sexual misconduct policies, does not deserve the opportunity to make his case because someone else's feelings are more important.