The challenge though, is the overwhelming amount of public records showing that others have been questioning the security and integrity of the software and elections going back to pre-2016. Also, Dominion and a few of it's subsidiaries have had lawsuits filed from other countries related to fraud and security.
Here's an article from Politico from 2016 where a team bought a system off of Ebay and hacked into it.
With Russia already meddling in 2016, a ragtag group of obsessive tech experts is warning that stealing the ultimate prize—victory on Nov. 8—would be child’s play.
www.politico.com
Here is another from 2019 that suggests Republicans are making it easy to cheat in 2020.......
The Senate Majority Leader and his allies are blocking reforms that would protect voting systems.
www.newyorker.com
Here's another article from 2019 that talks about security issues with voting systems and how lobbying squashes any questions around security
Voting machine manufacturers are increasing their Capitol Hill presence as lawmakers demand they do more to protect U.S. elections against foreign hackers. Dominion Voting Systems has hired its first, a high-powered firm that includes a longtime aide to Speaker Nancy Pelosi.
about.bgov.com
And another from 2018 that talks about vulnerability and even says that the machines switched votes from Beto to Ted Cruz (strange, that was a big 2020 accusation as well)
When Americans go to the polls, will hackers unleash chaos?
www.scientificamerican.com
Here is an article from 2019, straight from Klobuchar's own .gov website where several dems suggest security issues......
Intelligence Agencies have confirmed that our election systems are a target for foreign adversaries, yet election vendors continue to sell equipment with known vulnerabilities The Ranking Members of the Senate Rules, Intelligence, Armed Services, and Homeland Security Committees are requesting...
www.klobuchar.senate.gov
and here is Stacey Abrams accusing her opponent of colluding with the manufacturers of the voting systems GA used in her election.......
Gov. Brian Kemp and other officials are steering Georgia toward buying a kind of voting machine made by ES&S, a company with deep ties in the state.
www.ajc.com
And here is my personal favorite, Sanders and supporters accusing Hillary and other democrats of rigging the primaries......."dem on dem crime".
Elizabeth Warren, who was a top Clinton supporter, says the contest against Bernie Sanders was unfair.
www.bbc.com
So in summary, whilst I know how badly 51% of America wants the concerns with election integrity to be Trump's fault, the harsh reality is both sides have been creating questions long before Trump was ever a politician. Dems even accuse each other of cheating........
Dominion would probably do themselves a favor if they just allowed source code review, which they vehemently fight in every single lawsuit filed since company inception.