(Salem, OR)  --  Democratic Senator Ron Wyden is joining a group of 13 senators across the nation in calling for a federal investigation into the 2020 Census.  The group sent a letter to the inspectors general of the departments of Justice and Commerce raising concerns over new evidence dealing with a citizenship question.  This letter follows previous efforts by Wyden to push back against Secretary of Commerce Wilbur Ross's decision to add the citizenship question to the Census.