What needs to be remembered is context.
For 8 years I served on my local district's election board. Our polling machines were made in the early 2000's, with a mechanical touch panel and LEDs which showed which candidate was chosen on the ballot that was affixed over the panel. Inside the locked cabinet there is a data cartridge that recorded the votes, and a paper tape that printed the vote totals. The back of the cabinet has LED counters and other diagnostic indicators.
I could not tell you how many people believed these devices could be hacked into from either across town or overseas, despite these devices having no data connectivity.
Now I am not saying there aren't polling devices that are connected; I am simply saying that not all are online. If states/local jurisdictions called up an accredited cyber security engineer (like, I don't know, maybe a CISSP?) who can examine the polling devices and determine whether or not they are online that might go a long way in dispelling the idea the devices can be hacked.
Of course, what the humans who tabulate the data do after the polls are closed are another story entirely.
