Class 1 U.S. senators belong to the electoral cycle that has recently been contested in 2006, 2012, 2018, and 2024. The next election will be in 2030. (en)
Class 2 U.S. senators belong to the electoral cycle that has recently been contested in 2008, 2013 , 2014, and 2020. The next election will be in 2026. (en)