Sounds like a good issue to pounce on.
Meanwhile is there a RECALL provision in state law? I saw supporters of Sen Burns ought to try to dislodge the left wing Sen Tester.
I don’t think you can recall a federal officeholder, that sounds like it would be unconstitutional. But an investigation should come forward and if it proves enough votes were suspect, Tester should be expelled by the Senate (for which they have grounds to do so) and Burns seated or a new election called. The question is whether Burns is game to file a complaint, assuming he still can.