BUDOS said:
I'm not a computer dude, but to mess with the voting machines, don't they have to be connected to the internet?
I do recognize that the software within the individual machines have to be checked and cleared before each election, at least in my state.
If you look, the problem of election integrity goes back more than a decade. Ironically, Hillary Clinton complained that the 2016 election was rigged, saying in a post-election interview that " There was a widespread understanding that this election [in 2016] was not on the level"
Hillary Clinton Maintains 2016 Election 'Was Not On the Level': 'We Still Don't Know What Really Happened'
In April 2018, Democrats filed suit against the Russian Federation, President Trump, and a number of individuals involved in the 2016 election for Trump and the GOP, claiming they rigged the election in favor of Trump.
Democrats sue Trump campaign, Russia and WikiLeaks over alleged election conspiracy - Los Angeles Times
DNC COMPLAINT.pdf
That case was dismissed with prejudice, meaning the case had a substantial legal defect. Notably, though, Judge Koetl commented that Russia enjoyed state immunity and that Wikileaks enjoyed press protections.
DNC Loses Racketeering Suit Over 2016 Election Hack | Courthouse News Service
The case was part of an ongoing debate about election security. In 2017, the New York Times argued for open source voting software,
Opinion | To Protect Voting, Use Open-Source Software - The New York Times
and a number of private groups argued for scrutiny into how voting machines counted votes.
Verified Voting Foundation: Principles for New Voting Systems | Verified Voting
Hackers will work with government, academia to make future elections secure - Oct. 10, 2017
One Man's Quest to Break Open the Secretive World of American Voting Machines - POLITICO
The State and Local Election Cybersecurity Playbook | The Belfer Center for Science and International Affairs
So, whether Trump truly believed the 2020 election was stolen, or was following up on Clinton's tactics from the prior Presidential election, or some combination, the debate over election confidence has been going on for a long time. Both major parties have argued at times that elections were insecure, as have a number of experts.