How accurate are claims that the US election is rigged?

Trump’s criticisms of the integrity of the 2020 US election are due to his fear of losing

Question: How accurate are claims that the US election is rigged?
Position‹3 of 3: Claims that the US election is rigged are not accurate at all
Argument1 of 4›: Trump’s criticisms of the integrity of the 2020 US election are due to his fear of losing

Claims that the US election is rigged are not accurate at all. The Trump administration is scared of losing the 2020 presidential election and therefore are bringing the integrity of the election into question.

The argument

Trump’s rhetoric surrounding the integrity of the upcoming US presidential election is related to his worries about losing to Biden. As he lags behind Biden in public opinion polls, people are increasingly worried that Trump may undermine the election results if he loses by claiming that it was rigged.

Premises

[P1]Trump's rhetoric about election integrity tracks his worries about losing to Biden. [P2] As he lagged behind Biden in the polls, observers feared he would undermine the results by calling them rigged if he lost. [P3] His attacks therefore stem from self-interest, not genuine evidence of fraud. [C] Therefore, because Trump's criticisms of the 2020 election's integrity are due to his fear of losing, claims that the US election is rigged are not accurate at all.

Counter-arguments

Any discussion about Trump's unwillingness to accept defeat (or potentially leave office) is baseless and a conspiracy. It is also hypocritical given that Democrats Hillary Clinton and Stacey Abrams both openly questioned their own election results.

Rejecting the premises

[Rejecting P1] Motive and truth are separate questions. Even if the rhetoric tracked the polls exactly, that would bear on why the claims were made, not on whether they were accurate — which is what the question asks. [Rejecting P2] What observers feared might happen is a prediction about a candidate's future conduct, not evidence about the election, and the premise offers nothing at all about how the vote was conducted or counted. [Rejecting P3] The argument reaches its conclusion entirely by attacking the speaker rather than the claims, so it cannot establish that those claims are "not accurate at all" — a stronger conclusion than the premises reach even on their own terms. The counter-argument adds that candidates in both parties have publicly questioned results they lost.