https://www.usatoday.com/story/news/politics/elections/2020/09/15/morning-consult-poll-minnesota/5801624002/
Up from +3 in June. Also:
Despite the tightening race, Biden remains in the lead and other polls have found him with a more comfortable margin. On Sunday, a CBS News/YouGov poll found him leading Trump by 9 points, 50%-41%, among likely Minnesota voters and a New York Times/Sienna College poll released last week found him ahead by the same margin.
Overall, the polling site FiveThirtyEight finds Biden with a 7.6-point lead in its polling average – slightly higher than his national lead. RealClearPolitics' polling average has Biden up 8.8 points in the state.