This sounds like a very personal question. You could get your thought process going by thinking about the following questions:
What do you think is most difficult about living in the US today? How could we improve those things?
What would your dream society look like? In which ways is it different from our society today? What could we do to make our society more like your utopia?
Which values are important to you? Start thinking of things that you want for yourself, then about things you want for your loved ones. Do you have them in mind? Now, are these also things you want for all people? For instance: do you feel like everyone deserves to have enough food, a home to live in, good and affordable education, the right to vote, to get paid vacation when they have a baby, ... Which of those are things we don't all have yet? Those are the rights you could fight for as an Enlightened Philosopher.