It began on February 19 at 509 Porter Street in Vallejo, California, and continued through yesterday, at 1304 Franklin Avenue in Wilkinsburg, Pennsylvania, just outside of Pittsburgh. In between, the trend struck Florida and Michigan and Kansas and Ohio. There have been 23 mass shootings in the last 20 days in the U.S., according to the Gun Violence Archive, defined by incidents in which four or more people are shot. It has been a deadly spasm of gun violence, the latest reminder of a national sickness.

The most violent day in the last three weeks was February 20. It included the Uber driver in Kalmazoo, Michigan, who went on a rampage in between picking up fares. You probably heard about that one, but did you hear about the four other mass shootings that day? All five incidents, spanning four states, left a total of 15 people injured and 10 people dead.

Over the course of 20 days, 128 people were shot by mass shooters. 86 people were injured and 42 were killed across 17 states. The single worst incident was in Hesston, Kansas, where a man went to three locations in the course of 24 minutes, shooting 18 people and killing four. He was a serial domestic abuser who had been served a restraining order against his girlfriend. The other incidents on the list fit all types of profiles: Workplace shootings, school shootings, gang shootouts.

Apart from a question or two at the Democratic debates, gun violence has rarely been on the radar of this monumental presidential campaign. There have been 9,210 shootings in the United States since January 1, according to the Archive. There are too many sick people in this country, and it's far too easy to get a gun. Hell, it's as easy to buy your new AR-15 on Facebook as to like a friend's status update. Maybe it's time we started trying to cure this American disease.

Jack Holmes Politics Editor Jack Holmes is the Politics Editor at Esquire, where he writes daily and edits the Politics Blog with Charles P Pierce.

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