Andréa noted these two rerun strips appearing on the same day last week. Not exactly the usual synchronicity, where two comics make the same joke or take up the same (unexpected) topic. Rather, one is making a direct reference to the other.
This Boondocks comes at the end of a week series in which Grandpa expects Huey to help out with household chores, specifically mowing the lawn, and Huey likens this to illegal child labor practices and even to slavery. Here he returns to the child labor idea, and brings in the example of American companies using exploitative practices, including child labor, in their overseas facilities or those of their suppliers. And what is his news source? Another comic strip!
Here is the week of Doonesbury on this theme, concluding with the one appearing in rerun on the same day as the Boondocks above.