Essays / Analytical Assignment: use the images in the picture to show our culture [6]

Hi, everyone! I have a question about making an argument for my analytical assignment. I need to base on what I see from the picture to find the implication of it. The purpose is to use the images in the picture to show our culture. The picture is about when Obama were shaking hands after he spoke at a town hall meeting about health care reform. Obama's back faced to the camera, and a group of people was shaking hands with him. In the crowd, there was one lady was holding a sign to against his reform.(Obama disregarded that lady.) In the background, you can also see some people were just sitting there. I have an idea that this can describe three groups of people in American society. They are people who support the government, people who are against the government, and people who are neutral/ do not care about the changes. However, I cannot find a central argument to write this paper(4-5pgs). I hope I can use this picture because I spend a long time to find it. I hope someone can help me to make an argument or give me some ideas. By the way, I can use other research to support my paper. Thanks!