In Michigan, where only .3 percentage points separated Trump and Hillary Clinton in the 2016 contest, the survey shows the traditionally blue state remains in play in 2020 but foreshadows another nail biter. Sanders and Bloomberg, who both top Trump by 5 points, and Biden, who leads Trump by 4 points, are the only candidates whose lead falls outside of the margin of error in Michigan.
https://www.politico.com/news/2020/0...ichigan-116409

Amash's independent bid could cost Trump the election. If he peels off enough voters to support him for Congress those people might not vote for Trump. They're far more likely to vote third party and a few thousand votes could swing the race!