Even assuming he does appoint such a judge. The open seat right now was held by Antonin Scalia who was on the dissenting side of the Obergefell v. Hodges case.

Even assuming he does appoint such a judge. The open seat right now was held by Antonin Scalia who was on the dissenting side of the Obergefell v. Hodges case. So it wouldn't changed the out come for that issue on the court. Even if he got the opportunity to appoint a judge to replace one of the democratic appointments it would be very unlikely that the same sex marriage decision would ever be over turned. Roe v. Wade wasn't over turned despite the supreme court having a majority of Republican appointees for a long period between the original decision and present day. Is Trump indifferent to LGBT issues? probably. But I just don't see much factual basis for the hysteria surrounding his election. If you believe the news, people are acting like he is going to round them up and put them in concentration camps or something. It just isn't reality.