I can't believe there are some people who are trying to spin this.
There was nothing inappropriate about the young men's behavior. They asked an elected representative a question about the President's agenda in a public place. Again, there is nothing wrong with this, at all.
Possible answers Etheridge could have given:
1. Yes, I support the President's agenda.
2. I only support parts of the President's agenda, such as...
3. No, I don't support the President's agenda.
4. No comment.
5. Leave me alone.
There was nothing inappropriate or partisan about the question. Our President does indeed have a political agenda, and there is nothing wrong with asking an elected representative if he or she supports it. The question was broad but entirely relevant and totally innocuous. Only someone with a skewed sense of politics would consider this question inflammatory, partisan, rhetoric, etc.