Carper(DE), Stabenow(MI), and Cantwell(WA).
If Carper(DE) retires,
Lisa Blunt Rochester- At Large US House Member.
If Stabenow(MI) retires,
Lt Governor Garlin Gilchrist-D, Secretary of State Jocelyn Benson-D, or Dana Nessel-D.
If Cantwell(WA) retires.
US Representative Suzan DelBene-D, Pramila Jayapal-D, Kim Schrier-D or Marilyn Strickland-D.
Democratic US Senators since 2007
Klobuchar(MN),Tester(MT),Menendez(NJ), Brown(OH), Casey(PA), and Whitehouse(RI).
If Klobuchar(MN) retires,
Lt Governor Penny Flanagan-D, Secretary of State Steve Simon-D, Attorney General Keith Ellison-D, or State Auditor Julie Blaha-D
If Tester(MT) retires- Republican Pickup.
If Menendez(NJ) retires,
US Representative Andy Kim-D, or Mikie Sherrill-D.
If Brown(OH) retires,
Mayor John Cranley(Cincinnati) or Nan Whaley(Dayton). Whoever does not become Governor.
If Casey(PA) retires,
US Representatives Matt Cartwright-D or Conor Lamb-D.
If Whitehouse(RI) retires,
US Representatives David Cicilline-D or James Langevin-D.
Democratic US Senators since 2013
Murphy-CT,Hirono-HI,Warren-MA, Heinrich-NM, Gillibrand(NY), Kaine(VA), Manchin-WV, and Baldwin-WI.
If Murphy-CT retires.
US Representatives Jim Himes-D or Jahana Hayes-D,
If Hirono-HI retires,
Tulsi Gabbard-D
If Warren-MA retires,
US Representatives Lori Trahan-D, Katherine Clark-D, or Ayanna Pressley-D.
If Heinrich-NM retires,
State Auditor and Attorney General Hector Balderas-D, Lt Governor Howie Morales-D, or Secretary of State Maggie Toulouse Oliver-D.
If Gillibrand-NY retires,
Alexandria Ocasio Cortez.
If Tim Kaine-D retires,
US Representatives- Elaine Luria-D, Abigail Spanberger-D, or Jennifer Wexton-D.
If Joe Manchin-WV retires
Republican Pickup.
If Tammy Baldwin-D retires-
Lt Governor Mandela Barnes-D, State Attorney General Josh Kaul-D, or State Treasurer Sarah Godlewski-D. Whoever does not get the Democratic nomination for the US Senate in 2022.
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