Whatever candidate you are supporting, the main thrust of that support should be - will that candidate support nominees for the Supreme Court who will interpret the law (as written in the Constitution), and not make the law?
Coming up during the next administration will be 3 or possibly 4 openings to fill vacancies on the Supreme Court. If you elect, as president, someone who will appoint activist judges, who will tend to have a “progressive” interpretation of the Constitution, then you can expect to see a wholesale change to our society as we know it.
