Last time I looked US gun+knife crime had far more victims than European knife crime. Even in Glasgow, former knife crime capital of Europe, which had a very successful violence reduction project.

https://crookedtimber.org/2012/07/20/america-is-a-violent-co... : "the most striking features of the data are (1) how much more violent the U.S. is than other OECD countries (except possibly Estonia and Mexico, not shown here), and (2) the degree of change—and recently, decline—there has been in the U.S. time series considered by itself."

US crime is high, but falling from its very high peak, more or less independently of who's President.

> No mass shootings, but do look up knife crime and sexual assault statistics.

You can be certain that has nothing to do with unemployment.