I think the most sensible way to define "caucus" here is by vote on the organizing resolution that determines majority control. Other suggestions welcome, I'd like to nail down a definition in the next day or two.

As best I can tell this race will be R (Ricketts or Dunn) vs I (Osborn). There won't be a Dem contender. Osborn has said he won't caucus with the Democrats. So mostly I'm curious: if he actually gets there, will he hold to that? Or decide he can exercise more power by participating, on one side of the aisle or the other? Or will a traditional R candidate win, or will there be a D candidate after all?

https://ballotpedia.org/United_States_Senate_election_in_Nebraska,_2026