Only two jurors were from NYC. The rest were from more Republican-dominated areas. It really does not matter what their political affiliations were. When you are on a jury, you look at the evidence and your instructions on what the law is.
As for Donald Trump's politics, I don't think he really cares about political parties. His family were Democrats, because they were in the real estate business in New York city and needed political influence in order to get favors such as abatements. So Fred Trump Sr. was a big donor and made sure to be seen as a Democrat. Donald Trump himself was raised in an atmosphere of corruption and political influence. That doesn't mean that his family, or he, accepted the ideological positions of that party any more than Trump accepts the positions of the Republican Party today. Trump began to align with Republicans after Giuliani became mayor of NYC.
Trump has clear prejudices regarding race and ethnicity, as did his parents, and sometimes those align well with others politically, but I wouldn't call him a loyal Republican. His family's business was penalized for their illegal evictions of renters because of their race and social status. so they were never in favor of "wokeness" so to speak. He is loyal to himself, and it just so happen that he gains immense power and influence these days through his use of that party to achieve his ends.
BTW, I would recommend that people interested in the forces that shaped Trump read the book
Too Much and Never Enough, written by his niece Mary L Trump. Although she has a deep grudge against him and that gets reflected in her style, she does a good job of describing the family dynamics that surrounded her uncle as he grew up to become what he has been as an adult.