With regard to those questioning the general integrity of such a large, heterogeneous system as the US electoral process, I don’t think the relevant question is “Is there any reason to believe that some amount of voter fraud may have occurred.” Instead, we should be asking, “If voter fraud did occur, is there any reason to believe that it would disproportionately favor one party over the other?” It’s a big leap from “the system’s latent vulnerabilities likely resulted in at least some failure” to “the system’s vulnerabilities were systematically exploited to the benefit of one party.” I haven’t encountered any convincing evidence in support of the latter conclusion.