The suburbs aren’t what they were 50, or even 15, years ago. Suburbs are getting more diverse, more educated, and more liberal overall. Polling consistently shows college-educated whites, particularly women, moving away from the GOP. I don’t think the law and order dog whistles are going to work. Even if some of these suburban voters want “something done” about the disorder, they certainly don’t think Trump is the man to keep the peace.
I think this is true on the west coast, mid atlantic, new england, and northeast... but not elsewhere - at least not yet.
Err this is arguably most true in places like Gwinnett or fort bend county. Long island burbs are trending right.
The Hamptons and the North Shore are trending Democrats. Which further shows that Democrats are becoming the party of metropolitan elites. The country as a whole may be trending at the same pace. The reason that Democrats look like they are free falling in places like Long Island and NE OH is that working-class whites there remain Democrat a lot longer than there southern counterpart. Vice verse for college-educated whites in the South and Interior West.