Susan Collins (Maine), next election: 2026.

202-224-2523 https://www.collins.senate.gov/services/invitations

Lisa Murkowski (Alaska), next election: 2022.

202-224-6665 https://www.murkowski.senate.gov/contact/email

Bill Cassidy (Louisiana), next election: 2026.

202-224-5824 https://www.cassidy.senate.gov/contact

Pat Toomey (Pennsylvania), next election: 2022.

202-224-4254 http://www.toomey.senate.gov/?p=contact

Mitt Romney (Utah), next election: 2024.

202-224-5251 https://www.romney.senate.gov/contact-senator-romney

Ben Sasse (Nebraska), next election: 2026.

202-224-4224 http://www.sasse.senate.gov/public/index.cfm/email-ben