"Guns in Mexico: A challenge to Obama and the NRA"

Here is an excerpt from my op-ed in today's San Diego Union-Tribune:

"Here is a public challenge to both the National Rifle Association and the Obama administration. I challenge you to prove that either of you has any idea what you're talking about when it comes to southbound weapons trafficking to Mexico. The issue at hand is not whether guns sold in the United States are making their way into Mexican cartel hands; that's indisputable. It's trying to figure out exactly how many of those...