Given the 17-point drop in his approval rating among all U.S. adults, it follows that Obama's support has declined among all major demographic and attitudinal subgroups, with one notable exception -- blacks.

Blacks' support for Obama has averaged 93% during his time in office, and has been at or above 90% nearly every week during his presidency. Thus, part of the reason Obama's support among nonwhites has not dropped as much as his support among other groups is because of his consistent support from blacks. (With Hispanics' approval rating down five points, greater declines among Asians, Native Americans, and those of mixed races account for his total seven-point drop among nonwhites.)