It's right here:
CEASE & DESIST: I, together with many Attorneys and Legal Scholars, am watching the Sanctity of the 2024 Presidential Election very closely because I know, better than most, the rampant Cheating and Skullduggery that has taken place by the Democrats in the 2020 Presidential…
— Donald J. Trump (@realDonaldTrump) September 8, 2024
Except there was no evidence of of any of this happening in 2020.
Look, for example, here:
The various claims of evidence alleging a stolen 2020 election have been exhaustively investigated and litigated. Judges heard claims of illegal voting and found they were without merit. (Learn more about how the changes that have happened since 2020 will affect the 2024 election and beyond.)
Rep. Liz Cheney, the former chair of the House Republican Conference, stated on February 23, 2021: "The president and many around him pushed this idea that the election had been stolen. And that is a dangerous claim. It wasn't true," she said. "There were over 60 court cases where judges, including judges appointed by President Trump and other Republican presidents, looked at the evidence in many cases and said there is not widespread fraud."
Or here:
After the 2020 US presidential election Donald Trump refused to concede, alleging widespread and unparalleled voter fraud. Trump’s supporters deployed several statistical arguments in an attempt to cast doubt on the result. Reviewing the most prominent of these statistical claims, we conclude that none of them is even remotely convincing. The common logic behind these claims is that, if the election were fairly conducted, some feature of the observed 2020 election result would be unlikely or impossible. In each case, we find that the purportedly anomalous fact is either not a fact or not anomalous.
Or here (this one has ties to Pennsylvania):
Free, fair elections are the lifeblood of our democracy. Charges of unfairness are seri-
ous. But calling an election unfair does not make it so. Charges require specific allegations
and then proof. We have neither here.The Trump Presidential Campaign asserts that Pennsylvania’s 2020 election was unfair.
But as lawyer Rudolph Giuliani stressed, the Campaign “doesn’t plead fraud. . . . [T]his is
not a fraud case.”
And so on.
So when a Republican (any Republican) complains about how President Biden has "politicized" the DOJ - they're just projecting their Trump wet dreams.