Wednesday night one of my 580,000 tweets blew up. I didn't live up to my own standards, and I didn't meet USA TODAY's standards. For that I apologize, to USA TODAY readers and to my followers on social media. ... Those words can easily be taken to advocate drivers going out of their way to run down protesters. I meant no such thing, and I'm sorry it seemed I did. What I meant is that drivers who feel their lives are in danger from a violent mob should not stop their vehicles. I remember Reginald Denny, a truck driver who was beaten nearly to death by a mob during the 1992 Los Angeles riots. ... I have always supported peaceful protests, speaking out against police militarization and excessive police violence in my USA TODAY columns, on my website and on Twitter itself. I understand why people misunderstood my tweet and regret that I was not clearer.