New York City Council Speaker Christine Quinn officially announced her run for mayor last week.  Quinn started her career as an affordable housing advocate with the Housing Justice Campaign for the Association of Neighborhood and Housing Development, and is positioning herself as the pro-middle class candidate. In a recent speech, she told an audience that New York City needs to become “a place that’s a beacon for the middle class.” After the Bloomberg era of rapid development, Quinn could usher in a new phase that makes affordable housing a top priority. While a few candidates have to yet to declare their candidacy, the race could likely include previous City Comptroller William Thompson, Public Advocate Bill de Blasio, and current City Comptroller John Liu.