Best possible current challenger candidates in Senate races

[Tekken_Guy]

For the GOP
-AZ: Would've been Ducey a year ago, now probably Kimberly Yee.
-CA: Perhaps David Valadao or Mike Garcia? Of course nobody's winning this state.
-CO: Mike Coffman?
-CT: Erin Stewart, perhaps?
-GA: Vernon Jones?
-HI: Their best shot is probably convincing Tulsi Gabbard to join the party.
-IL: Adam Kinzinger
-MD: Larry Hogan
-NH: Chris Sununu
-NV: Brian Sandoval, but I doubt he'd run.
-NY: From the house bench, probably John Katko.
-OR: Knute?
-VT: Phil Scott
-WA: Kim Wyman, or maybe Jaime Herrera Beutler

For the Democrats
-AK: Getting Murkowski to switch parties.
-AL: Doug Jones
-AR: Mike Beebe?
-FL: Debbie Mucarsel-Powell?
-ID: Paulette Jordan?
-IN: Pete Buttigieg
-IA: Rob Sand? This seat is probably unwinnable without Steve King as the GOP nominee.
-KS: Laura Kelly
-KY: Andy Beshear
-LA: John Bel Edwards, but he won't let Nungesser become Governor a year early.
-MO: Jason Kander
-NC: Roy Cooper isn't happening because of Mark Robinson. Jeff Jackson sounds decent enough.
-ND: Heidi Heitkamp
-OH: Tim Ryan
-OK: Kendra Horn?
-PA: Tom Wolf
-SC: Joe Cunningham
-SD: Billie Sutton
-UT: Ben McAdams
-WI: Ron Kind

[Tekken_Guy]

For the GOP
-AZ: Would've been Ducey a year ago, now probably Kimberly Yee.
-CA: Perhaps David Valadao or Mike Garcia? Of course nobody's winning this state.
-CO: Mike Coffman?
-CT: Erin Stewart, perhaps?
-GA: Vernon Jones?
-HI: Their best shot is probably convincing Tulsi Gabbard to join the party.
-IL: Adam Kinzinger
-MD: Larry Hogan
-NH: Chris Sununu
-NV: Brian Sandoval, but I doubt he'd run.
-NY: From the house bench, probably John Katko.
-OR: Knute?
-VT: Phil Scott
-WA: Kim Wyman, or maybe Jaime Herrera Beutler

For the Democrats
-AK: Getting Murkowski to switch parties.
-AL: Doug Jones
-AR: Mike Beebe?
-FL: Debbie Mucarsel-Powell?
-ID: Paulette Jordan?
-IN: Pete Buttigieg
-IA: Rob Sand? This seat is probably unwinnable without Steve King as the GOP nominee.
-KS: Laura Kelly
-KY: Andy Beshear
-LA: John Bel Edwards, but he won't let Nungesser become Governor a year early.
-MO: Jason Kander
-NC: Roy Cooper isn't happening because of Mark Robinson. Jeff Jackson sounds decent enough.
-ND: Heidi Heitkamp
-OH: Tim Ryan
-OK: Kendra Horn?
-PA: Tom Wolf
-SC: Joe Cunningham
-SD: Billie Sutton
-UT: Ben McAdams
-WI: Ron Kind

Agreed overall. For OK Dems, maybe Brad Henry? Yeah, ik, running former Governors didn't seem to work out well in general, but I guess he'd still be a more formidable challenger than a Congresswoman who was defeated after one term in office.

Worked well for Bredesen.