Schlapp or Kobach would make the race Likely R.
Sebelius is too moderate for KS Dems
Carl Brewer, or Paul Davis?
Laura Kelly is basically a clone of Kathleen Sebelius (with a very pro-gun history) and swept the primary. If Sebelius runs, she would easily clear the field and be the Democratic nominee. She is still the most powerful Democrat in Kansas.
I can't see Carl Brewer mounting a successful statewide campaign, maybe if 2020 becomes a great year for Democrat he could try for the 4th. Davis may try again, but if he can't win the 2nd against a weak opponent, I doubt he'll be able to win statewide.
Does Sebelius even live in the state anymore? Also I would think her baggage as HHS head could be used in ads against her