Democrats

Either in the regular election against Ernst-R or in the special election against Pat Grassley-R.

The successors to Murray(WA),Wyden(OR),Schumer(NY)and Crapo(ID) are likely to run in 2028 when these US Senators are likely to retire.

Murray(WA) was elected to the US Senate in 1992.
The class of 1992 US Senators
Boxer(CA) retired in 2016
Nighthorse Campbell(CO) retired in 2004
Coverdell(GA) died in 2000
Kempthore(ID) elected Governor in 1998
Moseley Braun(IL) lost re-election in 1998
Gregg(NH) retired in 2010
Faircloth(NC) lost re-election in 1998
Feingold(WI) lost re-election in 2010
Feinstein(CA) is likely to retire in 2024.

Wyden(OR),Schumer(NY), are Crapo(ID) are class of 1998 US Senators.
Lincoln(AR) lost re-election in 2010.
Bayh(IN) retired in 2010 and lost in a 2016 comeback.
Brownback(KS) elected Governor in 2010
Bunning(KY) retired in 2010
Edwards(NC) retired in 2004 to run for Vice President.
Voinovich(OH) retired in 2010