Advertisement2 More Lawsuits Join Legal Fight Over 2020 Census Citizenship QuestionApril 17, 2018Hansi Lo WangfacebookEmailAn envelope contains a test questionnaire for the 2020 census mailed to a resident in Providence, R.I., as part of the nation's only test run of the upcoming national headcount. A Trump administration plan to include a citizenship question on the 2020 census has prompted legal challenges from many Democratic-led states. (AP)