The results show a slight winnowing in Biden’s margin from early August, when he held a 49 percent-44 percent lead in the state.

The poll was conducted in the aftermath of the shooting of Jacob Blake, a Black man, in Kenosha, Wis,. by a white officer, fueling intense unrest in the city over systemic racism and police brutality. Blake survived the shooting but is partially paralyzed.

Many of the protests have remained peaceful, though there have been instances of looting and clashes with counter-protesters.