Yea, MN cheated big. Ramsey county voted 80% for Biden. In all the years in Ramsey, I rarely saw signs for a republican, and in 2016 only for Hillary, but in 2020 very very few signs for Biden and a bunch for Trump. They had to vote for a bunch of people who didn't actually show up to push Biden over the finish line IMO.
as far as the graph goes, bigger states should have more weight than smaller states (population wise) so 66.7 is not an average of all the percentages but instead of all the people totaled together.