What would a citizenship question mean for the census? (Wennie Chin, Paul Westrick)

Last month, the Supreme Court heard arguments over whether to allow a question on the 2020 census that asks whether the person filling out the form is a US citizen. In this installment of TrumpWatch, Wennie Chin and Paul Westrick of the New York Immigration Coalition, one of the original plaintiffs in that case, discuss what the consequences of a citizenship question would look like.