Former HD-15 state Rep and current state GOP chair Dave Williams - elected after the 2022 electoral annihilation that wiped away most of the guardrails within the state party - has expressed interest in the seat. He unsuccessfully tried to primary Lamborn in 2022 (after failing to get "lets go Brandon" listed as his ballot nickname) and got a third of the vote.
Far from a good candidate, but the ruin of a state party may have no choice in this matter.
He’d likely lose the primary.
Actually I'd say he's the frontrunner right now. There is a LARGE field of candidates who will likely split the establishment vote in this seat.
Williams has high name recognition, got 33% of the vote in the 2022 primary and will consolidate the far-right vote, unlike in the other Colorado seats.
