Hansi Lo Wang for NPR:

The controversial new citizenship question the Trump administration added to the 2020 census may turn out to be a “major barrier” to the country’s full participation in the upcoming national head count, according to a national study commissioned by the Census Bureau….

In focus groups conducted in March and April to inform the government’s outreach efforts for the census, some participants identified that question as a significant reason why they would avoid taking part in the head count.

“They tended to both believe that the purpose of the question was to find undocumented immigrants and that the political discourse is targeting their ethnic group,” explained Sarah Evans, a lead researcher at PSB, a firm that is affiliated with census contractor Young & Rubicam. “This was an idea we heard across audiences,” she added.