The specific information about Chicago Mayor Brandon Johnson claiming that “Chicago was built by slaves” and the subsequent internet reaction mentioned in the YouTube video title is not available in the provided search results.
The search results focus on Johnson’s reparations initiatives, including his establishment of a reparations task force with $500,000 in taxpayer funding and his formal apology to Black Chicagoans for historical wrongs. However, they do not contain details about the particular “built by slaves” statement or the online backlash referenced in the video title.
Without access to the specific story and reactions mentioned, I cannot provide an accurate news article about this particular incident.