How support for Biden and Trump has shifted since May

Q: If the 2020 presidential election were held today, which one of the following candidates would get your vote?

Margins of error for regional subgroups are higher than the statewide sample. In May, the question was phrased: "If the 2020 presidential election were held today, for whom would you vote if the candidates were Joe Biden, the Democrat, and Donald Trump, the Republican?" The option for "other" candidates was not included.
Source: Star Tribune/MPR/KARE 11 Minn. Poll, Sept. 21-23, 2020, 800 Minn. likely voters, +/-3.5% margin of error, and May 18-20, 2020, 800 Minn. likely voters, +/- 3.5% margin of error.