Even so, I'm not talking onesies or twosies, a dead person ballot here or there. I mean, chances are there is at least one polling location that did something fraudulent that affected thousands of votes. There are probably over 100,000 polling locations in the US (source: quick Google search).
So even if the Trump investigations and the lawsuits turn up some really bad issue somewhere, imho chances are it's a one-off and it would be dangerous to extrapolate.
Any fraud out there enough to make a difference in any statewide or national race? Very unlikely. But I bet you there are a few local politicians who just got elected fraudulently.
Have you ever worked the polls?
I don't know how things work where you live, but in Michigan it would be very difficult for a polling location to do something fraudulent like that. Everything gets checked by probably a dozen people at City Hall before it goes to the precincts.
Before the polls open, we have to break the seal on the e-pollbook flashdrive, start the laptop, and check that everything in the e-pollbook is zeroed out and set to the right precinct. Sweep the tabulator to make sure that it's empty. Start it up and print out the zero tape. Have every precinct worker check that all races are zeroed out and sign the zero tape (which remains attached to the machine all day). Break the seal on the ballot case. Check the printed sheet indicating the starting and ending numbers for the ballots against the ballots actually in the case. Record this. Have everyone sign the opening page in the hard-copy pollbook.
After the polls close, at least two people back up the e-pollbook, file various reports, and complete the ballot report: the number of voted ballots (from the tabulator) must equal the number of issued ballots minus the number of spoiled ballots. If not, there's a big fuck-up and there will be an investigation. The tabulator is hooked up to the secure modem to transmit the results directly to the county, and four copies of the results tape are printed. Three are left attached to the zero tape, and all three have to be checked and signed by all precinct workers. The fourth is taped on the wall so that any public observers can check it. The memory cards are removed from the tabulator and placed in a case with the e-pollbook flashdrive. The chair and co-chair sign the form on the cover of the case, insert a locking seal into the closure, and record the seal number in the hard-copy pollbook. Next, at least two workers remove all the ballots from the tabulator and sort them to find ones with write-in candidates. These are checked against the list of valid write-in candidates. Ballots with valid write-ins go in one folder, those with in-valid write-ins go in another folder (note that all non-write-in races were automatically tabulated). There are a bunch of forms that go with these and are included in the hard-copy pollbook. Both folders are sealed with stickers that have to be signed by the chair and co-chair. All spoiled ballots go in another envelope that has to be sealed and signed. Surrendered absentee ballots go in yet another folder that is sealed and signed. All ballots go back in the ballot case with the unused ballots. The cover form is signed by the chair and co-chair, the case closure is sealed, and the seal number is recorded in the hard-copy pollbook. Once all of this is completed and checked by all precinct workers, everyone signs the closing page of the pollbook, and we affix the zero-tape and attached signed results tapes to the pollbook.
The chair and co-chair then take the sealed ballot and memory card cases, the laptop, any affidavits, the ballot applications, and various other paper-trail stuff (don't have a full list handy) back to City Hall, where we wait for a dozen or so people to pick through everything that all of the precincts have done to make sure that everything is in order before all of the ballots and hard copies go to the county to corroborate the wirelessly transmitted reports. This step is taken very seriously; when I waited last week, several other precinct chairs/co-chair got called in to address minor issues (usually a signature was forgotten, although in one case the ballot case seal wasn't affixed properly and had fallen out in the chair's car). One entire precinct team got called back in because they'd forgotten to sign one copy of the tapes. The precinct chair and I waited until 11:30 pm until we got the all-clear, with the caveat that if the county found something wrong later, we might get a 4 am call at home (we didn't).
During the election, 1) we're really, really busy actually doing work. I got two 30-min breaks during a 17.5-hour day. 2) What kind of fraud could we commit? Seriously, explain it to me. Between all of the witnesses and the paper and electronic trails, how would we commit fraud that would affect thousands of votes?