This will cover Gubernatorial, US Senate, and US House. Let me know of progressives for other offices if you can. Let's get started!
AZ-1: @EvaPutzova, challenging @RepOHalleran.
AZ-3: @RepRaulGrijalva, for re-election.
AZ-6: @AnitaMalik, challenging @RepDavid.
CA-1: @audrey4congress, challenging @RepLaMalfa.
CA-12: @ShahidForChange, challenging @SpeakerPelosi.
CA-15: @aishabbwahab, for the seat held by @RepSwalwell.
CA-29: @Angelica4CA, challenging @RepCardenas.
CA-45: @katieporteroc, for re-election.
CA-49: @RepMikeLevin, for re-election.
CA-50: @ACampaNajjar, challenging @Rep_Hunter.
US Senate: @Diana4Colorado, @lorenaforsenate, @Romanoff2020, all challenging @SenCoryGardner.
@LeftwardSwing Sure you probably have a better idea than I do on this.
US Senate: @TeamStavaMurray, challenging @SenatorDurbin.
IL-3: @Marie4Congress, challenging @RepLipinski.
CALIFORNIA (3/?)
CA-51: @AGlassBlake, challenging @RepJuanVargas .
COLORADO (2/?)
US Senate: @StephanyForCO, challenging @SenCoryGardner.
CO-1: @crisantaduran, challenging @RepDianaDeGette. (Not entirely sure on this one still, so proceed with caution!)
I'll continue with more in a few hours.
ARKANSAS:
US Senate: @DanWhitCongress (I), challenging @TomCottonAR.
And while he hasn't announced yet, @dcforcongress is exploring a run for IA-2!
NC-9 (2019 Special) @Kleptosclerosis (L), @loranallensmith (G).
Yes, the libertarian candidate is really progressive too.
OH-5: Gene Redinger (No Twitter), challenging @boblatta.
Here's his website: redingerforcongress.com/stances/
US Senate: @ForSourh, challenging @LindseyGrahamSC.
SC-2: @NathanielSC2020, challenging @RepJoeWilson.
US Senate: @_SemaHernandez_ , challenging @JohnCornyn.
TX-10: @SiegelForTexas, challenging @RepMcCaul.
TX-14: @AdrBell challenging @TXRandy14
WA-3: @VoteKhalil, challenging @HerreraBeutler.
WA-7: @RepJayapal, for re-election.
WA-10: @Joshua4Congress, challenging @RepDennyHeck.