Many Democrats running for president have been spending time in the Waterloo-Cedar Falls area over the last number of weeks. It’s because of a special state senate election. Jeff Danielson, a Democrat, left his senate seat abruptly last month and Governor Kim Reynolds set the special election for this coming Tuesday, March 19th. Presidential hopefuls Beto O’Rourke, a former Texas congressman, and Minnesota Senator Amy Klobuchar will be knocking doors for the Democrat, Eric Giddens. He's running against Republican Walt Rogers.