The Justice Department is set to defend the addition of a citizenship question to the 2020 census as a trial over the issue opens in federal court in New York on Monday.

The Justice Department is set to defend the addition of a citizenship question to the 2020 census as a trial over the issue opens in federal court in New York on Monday.

Stories this photo appears in:

Tease photo

First on CNN: Justice Department won't comply with House subpoena over citizenship question on census

The Justice Department has informed the House Oversight Committee that it will not comply with a subpoena demanding the appearance of an official as part of the Democrats' probe into the addition of a citizenship question on the census, according to a letter obtained by CNN.