If he is found guilty, he could make the argument that publications making that claim prior to the verdict swayed the jury’s opinion. One would think an informed jury is always a good thing, but American courts are very strict about the information they present to the jury and in which context to allow them to make decisions. Not that it is likely, but it could result in a mistrial if it was proven that any juror read any news from the publication making the claim.

After he is found guilty, and assuming the verdict stands, publications are free to say he was convicted of X, Y, or Z freely.