There’s going to be a lot of cheating. The real threat to the integrity of the vote is from the inside and from the left.
This statement from Nielsen may be meant to act like an inoculation; once the Dems lose hugely, their immediate response will of course be “The election was rigged/hacked/stolen” etc. Pf course Dems cannot listen to reason, and care nothing for reality or facts; but still this can be used to bludgeon them with.
“Nope, you lost fair and square. Russians didn’t do it.”
I think the DHS has been doing a lot under the radar.