That was once true in most every southern state. WV and Arkansas, and Lousiana to a lesser extent, are about the only ones left with that alignment. It’ll change once Byrd and Rockefeller leave the scene.
With the WV GOP in the total disaray it's in now (and has been for a while) I don't see how that could happen. Rockefeller just won and if Byrd goes before the end of his term four years from now, Manchin will appoint a Rat. (Anne Barth?)