It's an applause light. Could be anyone, although the phrasing of that particular applause light makes me suspect either a moderate conservative group or a liberal-leaning group that's trying to establish centrist bona fides.

A whole lot of American political groups use economic mobility in their rhetoric (it's sort of a cultural talisman), so that by itself doesn't tell you very much; you need to dig a little deeper and find out how they're constructing economic mobility if you want to learn about their actual ideology. In particular, the American economic right tends to draw lines between ensuring equality of opportunity and equality of outcome, while the American economic left either deemphasizes that (if the group in question is more centrist) or actively asserts that the two are inseparable (if more leftist).