Well, in 1967 in AR, the GOP had the Governorship and Lt Governorship with Winthrop Rockefeller and Footsie Britt, and one Congressman, J.P. Hammerschmidt, but conversely, I don't know if the GOP had any members of the state legislature (in the early '70s, they only had 1 in each body). Whether they are ready to turn to the Clintons is something else entirely. I think there is a reason why Hillary did not consider a return there to run -- because I don't think she could've won.
As it stands now, Congressman John Boozman becomes the de facto head of the party, as his earlier predecessor Hammerschmidt was after Rockefeller's death, with Huckabee's departure.
If he ran, Congressman John Boozman would have a decent chance of unseating Mark Pryor, but I don't see it happening.