There's a broad moving consensus against the carceral state and the "law and order" attitude that has been building for a long time, but that consensus will most likely unravel and may even stall out entirely if the issue becomes about race and riots. Any time something polarizes by race, minorities (in this case blacks) will lose out. There are a lot of white people who are needlessly killed by police, such as
John B. Geer, who don't get attention, but I think drawing attention to their stories too is a part of what it will have to take to sustain a majority coalition.
But an outright "law and order" message will unlikely resonate unless the riots get really bad. Then, it'll be
Nixon '68 again.