Two Democratic strategists who recently viewed focus groups of suburban voters described high-propensity voters increasingly concerned about unrest in urban centers, though both strategists said it was unclear whether that concern would push them to Biden or to Trump.

One of the strategists described a focus group in which white, college-educated women reacted to the protests by discussing their own property values and, in one woman’s case, her family’s mortgage.

“White women who have college degrees are starting to really get sick of this,” the strategist said.

Some state polls are showing signs of it. In Pennsylvania, a critical swing state, a Monmouth University poll released last week found that Biden’s lead over Trump had narrowed statewide, and that Trump was leading Biden by 2 percentage points in 10 swing counties, including some Philadelphia suburbs, erasing a large advantage Biden had built there earlier this year.