The United States faces a tidal wave of rental housing demand—a fact that Congress does not understand, said J. Ronald Terwilliger at the ULI Terwilliger Center for Workforce Housing Policy Symposium, held on September 21, 2011, at the Washington, D.C., headquarters of the Collingwood Group, the sponsor. But demand is just part of the problem; affordability, he said, is another issue.