Murphy

“One of (Senator Murphy’s) hallmarks, and one of the marks of his future legacy, is that he is considered a bipartisan worker, who works across the aisle, It is a special, special quality that he has.”

Murphy's response treats that as radioactive. He acts like the only possible motive is partisan sabotage rather than the simple principle that only citizens should decide American elections.

…. When a senator can't defend open rolls without inventing motives, it reveals how little confidence they have in their own position. RNC Research highlighted the clip, and it lands because it exposes the emptiness. Americans want fair elections. They want systems that work. Dodging the question only deepens the distrust Democrats claim to fear. If the harm in a list of eligible voters is nonexistent, just say so. Murphy couldn't. 

That silence speaks louder than the conspiracy theories he reached for instead.

… worried about that) and much more about MATCHING BARCODES of the outer and inner envelopes in a mail ballot package.

Here is why that's the problem for them. If surplus mail ballots collected from people who aren't voting by mail are somehow voted on behalf of OTHER PEOPLE, it becomes readily detectable that a ballot was repurposed from its originally intended voter to someone else on the voter rolls. The "no-match" condition means that ballot was taken from the originally intended voter or it was given away.

Either way that's how fraud can be easily detected. Keep in mind, the barcode matching requirement does not require any personal information that isn't on the outside of an envelope, and it doesn't prevent states from using mail to conduct elections, so the hysterical reactions are confirmation they know the gig is up.