One candidate who is running is Allen Waters, who was the Republican nominee against Senator Jack Reed in 2020 (lost terribly) and the Republican nominee for this very same seat in 2022 against Cicilline (lost terribly).
Now he's running an anti-same sex marriage "Blue Dog Democrat" campaign. Lol.
Funny thing is that Rhode Island Democrats actually have a fairly robust moderate/conservative wing.
This guy obviously has no chance, but it's certainly possible that a split field allows a candidate from that wing of the party to win.