Commerce Secretary Wilbur Ross (left) talks to U.S. Attorney General Jeff Sessions before the start of a ceremony in February in Washington, D.C. The two Trump administration officials spoke about adding a citizenship question to the 2020 census in the spring of 2017, according to a new court filing.

Commerce Secretary Wilbur Ross (left) talks to U.S. Attorney General Jeff Sessions before the start of a ceremony in February in Washington, D.C. The two Trump administration officials spoke about adding a citizenship question to the 2020 census in the spring of 2017, according to a new court filing.