The president is committed to reforming our gun laws; a working group headed by Vice President Joe Biden is considering a broad agenda. The proposals mentioned, not formally announced yet, already are being strafed by politicians in both parties. Before everyone goes to the barricades, it would be worth trying to have a rational discussion. The reforms under consideration include the basic: reinstating the ban on the sale of assault weapons and high-capacity magazines. They include good governance: bolstering state reporting on felons, drug abuses, the mentally ill for the FBI database, strengthening mental health screening. They include what many …