Bill Cassidy is a member of the U.S. Senate from Louisiana. He assumed office on January 3, 2015. His current term ends on January 3, 2027.

Cassidy won re-election to the U.S. Senate to represent Louisiana outright in the primary on November 3, 2020, after the general election was canceled. Cassidy was first elected to the U.S. Senate in 2014, defeating incumbent Sen. Mary Landrieu (D-La.) and becoming the first Republican to hold the seat since 1883.

In July 2017, Cassidy released a healthcare proposal with Sen. Lindsey Graham (R-S.C.) to modify the Affordable Care Act. Cassidy previously represented Louisiana's 6th Congressional District in the U.S. House of Representatives from 2009 to 2015.