Before the Tucson shootings are lost forever in the mists of time (which, given this country's attention span, figures to be two weeks from now), we might do well to ponder the various reactions to the outrage. President Barack Obama responded as a president should, with dignity and eloquence. I thought his speech at the memorial service in Arizona was one of his strongest. He set the bar pretty high. "If this tragedy prompts reflection and debate, as it should, let's make sure it's worthy of those we have lost," he said. Amen to that. House Speaker John Boehner, who...