West Virginian, he believes STRONGLY that Joe should join with the other Democrats in making sure that the Voting Rights Bill gets passed...as stated in the actual letter (see link).
Aside from Paul Tagliabue , all signatories have deep connections to West Virginia, so they have what I'll call "Standing" when it comes to speaking to the WV Senator...and they are using their 'Notoriety' to help advance what any citizen is entitled to do...voice their strongly held opinion on a matter of national importance.
Sorry it counters what you'd like to have happen, but then, you are entitled to find others of similar notoriety who believe that the new states' laws on voting are appropriate...good luck with that.
Link: https://docsend.com/view/6f9g9kvwfm4w8862