The latest installment of CNN's docuseries Black in America asked the question "Who Is Black in America?" and examined the issue of colorism: bias based not just on race but also on actual skin color. The news special cited well-documented research confirming that lighter-skinned immigrants earn more than their darker-skinned counterparts. But one topic the special did not explore is whether skin-color bias has a tangible impact on American politics, particularly at the national level.

Are Americans more likely to vote for a minority candidate who is lighter-skinned? The experts we spoke with said it appears so.

David A. Bositis, senior research associate at the Joint Center for Political and Economic Studies, a think tank specializing in research relating to blacks, said that the numbers speak for themselves. "You can't think of many [black politicians] who are very dark," he noted.

To his point, most elected (as opposed to appointed) black American politicians who have broken a significant barrier have either been extremely light-skinned or part white. Examples include Edward Brooke, the first black senator to be popularly elected; Adam Clayton Powell Jr., New York's first black congressman; Douglas Wilder, the first black governor in the U.S.; and David Dinkins, New York's first black mayor. Then, of course, there is President Barack Obama, who is not as light as the others, but is also not dark -- and whom most Americans are aware is of biracial parentage.

Read more at The Root.