Person+1 invitations and one envelope per invitation? I found a video: https://therecount.com/wire/sen-bernie-sanders-ivt-arrives/2645865885 Going to take it frame-by-frame, but don't have much hope on first sight. Even at 1080p it's too blurry. Fun fact: Google images just goes with "senior citizen" for that image. ?

Source for that clip seems to be the CNBC stream

• Heaps of people carrying them around
• None of the envelopes look like they have ever been closed
• People seem to have received them at an entrance. Vacant chairs don't have envelopes; people "arriving" with envelopes in hand
• No one seems concerned about the contents. Plenty of people casually holding them in their hand, while chatting.
• One oddity is that Sander's envelope is marked with a name, by hand; that's not true for all.

I've seen enough; those are programs or some other "memories", people received. Is there a possibility that certain envelopes contained something else than others? Yes, of course. I haven't seen anything pointing to that being the case, though.