The Michigan Senate Oversight Committee, which was comprised of three Republicans and one Democrat, concluded there was no election fraud.
[T]his Committee undertook the foundational work of investigating the 2020 election — from both the perspective of election administrators, officials and workers and the perspective of the observing public. The Committee embarked upon hours of public testimony, the review of countless documents and presentations on the 2020 election, and careful review of the elections process itself.
This Committee found no evidence of widespread or systematic fraud in Michigan’s prosecution of the 2020 election. ...
This Committee exhausted every resource available to it to thoroughly and faithfully examine our elections process in Michigan and drill down on claims and testimony specific to the 2020 election.
But that won't stop Trump supporters from believing otherwise because feelings.