Census Bureau Director Steven Dillingham, wearing a face covering printed with the words “2020 Census,” was questioned by lawmakers Wednesday on plans for finishing the count. NPR has learned the bureau recently decided to end door knocking on Sept. 30, increasing the risk of an undercount.

Census Bureau Director Steven Dillingham wears a mask with the words “2020 Census” as he arrives to testify before a House Committee on Oversight and Reform hearing on the 2020 Census​ on Capitol Hill, Wednesday, July 29, 2020, in Washington. (AP Photo/Andrew Harnik)