As to the question of the judge, while I disagree with Trump's claim, I see no reason to treat it differently from those claims made by people on the left that an African American defendant can't receive a just verdict at the hands of a white judge and/or white jury. Same errant argument.
Two completely different situations. Trump is being a racist prick to save himself some money in a civil suit. And it's been proven time and time again through multiple credible sources that whites and minorities are not treated the same in criminal courts.