You HAVE to assume while the dems might have been thrown off their game late when Trump was more ahead than they thought, they have thought through the obvious ways of being caught, and of course have been working for years to essentially build tunnels under the wall.
I'm not saying their plan was fullproof and without risk, but I am saying it's unlikely if we catch 'em it's going to look like a 'stupid thieves' youtube compilation. We will have exposed something they knew was a risk worth taking, but it's not going to be totally obvious.
My experience with Democrats and election fraud goes back to the Kennedy/Nixon election and nothing was done about it then or since. After a lifetime of getting by with a behavior, people tend to get arrogant and with that careless. We also tend to ascribe greater intelligence and skill to our adversaries than they deserve. I don’t think President Trump is of the disposition to ignore this behavior nor is he lacking in intelligence or cunning. We may actually see something done this time.