A national survey released by CNN earlier this month found that voters trust Mr. Biden by a 51% to 45% margin to keep them “safe from harm.” And a Fox News poll of likely voters in Wisconsin, an important swing state, gave the former vice president a 5-point lead on the question of who they trust more to handle “policing and criminal justice.” Perhaps the president should make clear what he can do about the protests if he’s re-elected that he can’t do now.

One group that does seem to care as much as the president about this issue is his base of working-class white voters, and it’s clear that the Trump campaign’s focus is on boosting their turnout in November. The president’s critics chide Mr. Trump for not doing more to expand his appeal to constituencies that didn’t support him in 2016. But the campaign believes that Mr. Trump’s time is better spent on attracting people who fit the profile of a Trump voter but stayed home four years ago. It so happens that there is no shortage of such would-be voters, and many of them reside in important battleground states.

A Wall Street Journal news story from last month has the details. According to figures compiled by William Frey, a demographer at the Brookings Institution, if turnout rates in November match what they were four years ago, “about 62% of Michigan’s nonvoters this year, or 1.6 million people, would be white residents without a four-year college degree.” Pennsylvania has 2.1 million nonvoters who are demographically aligned with Mr. Trump, and Wisconsin has more than 800,000. “Those pools of potential voters are so large that even a modest increase in turnout would give a significant boost to Mr. Trump, assuming that he maintained his high, 60%-plus share of their vote from the last election,” reported the Journal.