The United States faces major challenges in sustaining a strong middle class in the decades ahead. Rapidly changing, often volatile economic conditions are making it more difficult to enter the middle class -- and stay there. Even as the bar to a middle class life is raised higher, economic opportunity is fading. As a result, the most rapidly growing groups in the U.S. -- particularly African Americans and Latinos -- face growing obstacles to entering, and staying in, America's middle class.
