Since 2001, the honorary title of president pro tempore emeritus has been given to a senator of the minority party who has previously served as president pro tempore. It has been held by Strom Thurmond (R-South Carolina) (2001–2003), Robert Byrd (D-West Virginia) (2003–2007), Ted Stevens (R-Alaska) (2007–2009), Patrick Leahy (D-Vermont) (2015–2021), Chuck Grassley (R-Iowa) (2021–2025), and Patty Murray (D-Washington) (2025–present). From 2009 to 2015, no senator met the requirements for it.
Since 2001, the honorary title of president pro tempore emeritus has been given to a senator of the minority party who has previously served as president pro tempore. It has been held by Strom Thurmond (R-South Carolina) (2001–2003) Robert Byrd (D-West Virginia) (2003–2007), Ted Stevens (R-Alaska) (2007–2009), Patrick Leahy (D-Vermont) (2015–2021), Chuck Gra,ssley (R-Iowa) (2021–2025), and Patty Murray (D-Washington) (2025–present). From 2009 to 2015 no senator met the requirements for it.