WASHINGTON DC (July 24, 2019) — Senators Charles "Chuck" Grassley (R-IA) and Ron Wyden (D-OR), the chairman and vice chairman of the Senate Whistleblower Protection Caucus, today announced the addition of three new senators to the caucus’ ranks. The new members include Sens Marsha Blackburn (R-TN), Tammy Duckworth (D-IL), and Kyrsten Sinema (D-AZ), bringing total membership to fourteen senators.