Mayor Nutter, speaking on MSNBC, said: "Congress has held numerous hearings, all kinds of speeches, all kinds of accusations in the Benghazi matter. Let's see what the Congress does now, and certainly the president will provide the kind of leadership that is necessary. We don't need any more speeches. We need action."
Friday's rampage could be a tipping point in a national debate over gun rights that has faded in recent years. Advocates pointed to three reasons why this shooting may change the climate in Washington in a way that the one at a Colorado movie theater and the attempted assassination of Rep. Gabrielle Giffords (D., Ariz.) did not.
The almost unimaginable killing of so many 6- and 7-year-olds has sparked an outpouring of public emotion; Obama is on stronger footing to champion gun-control measures now that he has been reelected and will never again face voters; and the National Rifle Association has been weakened after spending millions of dollars backing candidates who lost.
The scale and frequency of mass shootings has grown so extreme that gun-control advocates believe they now have a strong case to make to enact strict restrictions on automatic weapons. Their challenge, though, will be turning the latest wrenching moment into a winning legislative strategy.
That, they say, requires presidential leadership.
Obama, in his statement Friday responding to the Connecticut shooting, sounded angry and resolved as he recounted a string of recent incidents of gun violence.
"We're going to have to come together and take meaningful action to prevent more tragedies like this, regardless of the politics," he said. The president made almost the exact same pledge Saturday during his weekly address.
But Obama has not provided specific proposals, and White House officials would not say what the president meant by "meaningful action."
The gun issue would compete for Obama's attention with his top priorities, such as the fiscal fight with Congress and his plans to push comprehensive immigration reform early next year.
In the past, Obama has said he supports reinstating an assault-weapons ban and measures to toughen background checks on gun buyers. But his administration has not proposed any new legislation to accomplish those goals.
Obama's inaction has frustrated gun-control advocates, who say they were newly emboldened after Friday's shooting.
"If having dozens of people gunned down in an elementary school doesn't motivate Washington to do even the easy things they can do, it's not clear what will," said Mark Glaze, director of Mayors Against Illegal Guns, a group chaired by New York Mayor Michael Bloomberg, a political independent, that represents 750 mayors across the country.
Kristen Rand, legislative director for the Violence Policy Center, a gun-control advocacy group, said she senses a change in the political atmosphere. "The general public is reaching the point of being fed up, and I think this will push it over the edge," she said.