WASHINGTON - Unveiling a sweeping new gun control agenda driven by the deaths of 20 children in the Sandy Hook school massacre, President Obama said members of Congress are "going to have to have a debate, and examine their conscience."
Nowhere will that examination be more searching than in outstate Minnesota, where support for gun rights is strong and Democrats control all three big rural districts.
This checkerboard of farms, forests and prairie could well be the firewall that determines how far the administration can push a bitterly divided Congress to act on an expansive overhaul of gun laws.
Amid peaking emotions and stiffening gun lobby opposition, one centrist Minnesota Democrat has already altered course, while others find themselves having to finesse or refine their public postures on politically touchy measures that have long been stymied by a wary Congress.
"I've got to live with myself on these things," said Tim Walz, a southern Minnesota Democrat who runs with an "A" rating from the National Rifle Association (NRA). "There's a point where I've got to say, how do I want to wake up tomorrow?"
Walz has softened his long-held opposition to banning military-style assault weapons, one of the central planks of Obama's gun-control plan, along with universal background checks and limits on high-capacity ammunition clips.
But Walz isn't all the way there. "I have a responsibility as someone who understands firearms to explain what a semi-automatic weapon is," he said. "That can include my Benelli shotgun for duck hunting. It's a semi-automatic that can shoot one bullet after another by pulling the trigger."
'Devil in the details'