Most sheriffs are elected officials in counties nationwide. Hundreds are on Tuesday's ballot, and many run unopposed. In an exclusive survey, @marshallproj found that sheriffs are key to our debates on policing, immigration and much more. Find more survey results at the link in @usatoday's bio or at themarshallproject.org. Survey source: The Marshall Project with Emily Farris (Texas Christian University) and Mirya Holman (Tulane University), 2021.