President Barack Obama has wearily lamented "yet another mass shooting," this time in the nation's capital where the debate that raged earlier this year over tightening firearms laws has stalled amid opposition from gun-rights advocates.
The shooting at the Washington Navy Yard came a week after voters recalled two Colorado legislators who supported tougher gun measures, illustrating the strong political headwinds faced by lawmakers seeking to respond to the violence.
Obama, for one, has been powerless to get legislation passed despite a string of mass shootings during his presidency.
In the wake of the shooting at the Navy Yard, Obama spokesman Jay Carney said the president is implementing executive actions and reiterated his commitment to strengthening gun laws, including expanding background checks to sales online and at gun shows.
"The president supports, as do an overwhelming majority of Americans, common-sense measures to reduce gun violence," Carney said.
Even as it was unfolding, the Washington shooting was reigniting talk about guns.
But it was far from certain whether the shooting would actually influence the larger debate over gun control vs. gun rights, given that the already difficult politics of the issue have gotten only tougher since December's shooting at Connecticut's Sandy Hook Elementary School. That shooting, which killed 20 first-graders and six staffers, spurred Obama to propose stricter firearms laws to prevent future deaths.
Gun owners, aided by their advocates at the National Rifle Association, have successfully fought Obama's legislation, even though polls show broad support for tougher gun laws.
Obama and gun control advocates have vowed to continue fighting since the Senate rejected expanded background checks in April, but they can't point to a single new Senate supporter.
Obama didn't mention gun control as he addressed the Navy Yard shooting from the White House, promising to pursue "whoever carried out this cowardly act."
"We are confronting yet another mass shooting, and today it happened on a military installation in our nation's capital," Obama said. "It's a shooting that targeted our military and civilian personnel. These are men and women who were going to work, doing their job protecting all of us. They're patriots, and they know the dangers of serving abroad, but today they faced the unimaginable violence that they wouldn't have expected here at home."