Pew recently asked 1,003 adults 12 questions about political news information. Here are the percent who answered each correctly:
Let's look at the percent answering correctly two of the most "difficult" questions.
The political news dummies: women, blacks, young adults, folks with no more than a high-school degree, and Democrats. And the overall score:
Same pattern. You can add low-income folks to the list as well.
How about you can't vote without at least a passing grade? I have low standards.