Remember when far-left propaganda media in the US screamed “Trump is going to get a reporter killed”? Yeah, me too. Now we have an actual murder committed by a real Democrat politician, and the corrupt left-wing media establishment has either ignored the story completely or has not bothered to mention the party involved. You know if this was a Republican that every leftist media outlet in the country would be running the story 24/7 and screaming about “Trump and MAGA!!”
The best recommendation I heard from anyone on how to prevent or mitigate these mass murders came from an ex-Navy Seal and security expert who said that all large outdoor venues like this should have police snipers posted. That is what they do for the Super Bowl. The shooter used illegal weapons. Banning all guns will do nothing to prevent such a rampage; just ask England, France, Belgium, Spain, Mexico, ect.