REFILE-ANALYSIS-An inspired Obama wants to target gun violence, but how?

(Removes extraneous word in 8th paragraph)

* President casts issue as matter of protecting children

* A possible turning point on gun control, but other

priorities loom

* Re-election could give Obama more freedom to pursue gun

limits

WASHINGTON, Dec 17 (Reuters) - His words have been eloquent

and sympathetic, as they typically are when he is the voice of a

nation in mourning.

But President Barack Obama's response to a gunman's massacre

of 20 children and six adults at a Connecticut grade school has

revealed a more complex view of the president: emotional,

frustrated - and perhaps rethinking his largely hands-off

approach to gun control.

"We can't tolerate this anymore," Obama said late Sunday at

the vigil for the victims in Newtown, Connecticut, as he

recalled earlier mass slayings and the shooting of former U.S.

congresswoman Gabrielle Giffords in 2011. "These tragedies must

end. And to end them we must change."

Obama notably did not use the word "gun," but he did cast

his argument against violence in terms of another politically

potent image: protecting America's children.

"Can we honestly say we're doing enough to keep our

children, all of them, safe from harm?" Obama asked. "...If

we're honest with ourselves, the answer's no. We're not doing

enough and we will have to change."

Obama promised that "in the coming weeks, I'll use whatever

power this office holds to engage my fellow citizens - from law

enforcement to mental health professionals to parents and

educators - in an effort aimed at preventing more tragedies like

this."

It was the strongest signal yet that Friday's shootings and

Obama's standing -- he was just returned to office and will not

be up for election again -- may have inspired him to embrace gun

control as part of his second-term agenda.

It is an issue around which Obama has stepped carefully

during his first term and his re-election campaign, to the

frustration of gun-control advocates.

Despite a series of mass killings by gunmen in recent years,

polls have long indicated that most Americans are wary of

increased restrictions on guns.

And the gun lobby, led by the National Rifle Association,

has been a powerful force in building support among Republicans

and rural Democrats, to the extent that trying to push new gun

limits through Congress has been seen as a futile exercise.

But the slayings in Newtown, Connecticut, have given new

momentum to calls for more limits on guns, including the

reinstatement of a ban on the sale of "assault" weapons such as

the semiautomatic rifle that gunman Adam Lanza used.

Sen. Dianne Feinstein, a California Democrat, said Sunday on

NBC's "Meet the Press" that she will introduce a proposed ban on

assault weapon sales when the new Congress convenes in January.

New York Governor Andrew Cuomo, a potential Democratic

contender for president in 2016, was among others calling for

new laws that would limits access to guns.

And New York City Mayor Michael Bloomberg, a persistent and

vocal voice for gun control, essentially warned Obama against

inaction, saying that it should be at the top of his agenda.

It's unlikely that Obama will go that far, but it is clear

that the Newtown shootings - and the fact that five of the 12

most deadly shootings in U.S. history have occurred since Obama

took office in January 2009 - are weighing on the president.

"If you put aside the loss of troops ... these specific

instances of the shootings have impacted him more personally

than anything else," said one former Obama aide, speaking on

condition of anonymity.

Even so, any effort to get a significant change in gun

policy through Congress would be complicated by other

legislative priorities Obama has for his second term, the former

aide said.

"So the question is: Is (gun control) his thing? Or is it

immigration or tax reform?" the former aide said, listing other

policy goals. He said it was highly unlikely that the president

could tackle all three.

WHAT IS 'MEANINGFUL ACTION'?

Whatever the obstacles, Obama effectively has committed

himself to do something aimed at reducing gun violence by

promising to take "meaningful action."

So after the emotion of the moment has subsided, what might

he do?

Some analysts believe that Obama would support a renewed

push by Democrats in Congress to reinstate the assault weapons

ban, which Congress allowed to expire in 2004. The analysts also

believe that he would back stronger steps to ensure that the

mentally ill are unable to buy firearms easily.

Obama may be able to take some action by executive order,

without waiting for Congress to act.

"We could do more to improve our mental health data reporting

into the background check system," said Adam Winkler, a

professor at the UCLA School of Law. "That may be done by

executive order."

However, Winkler said, the Supreme Court has said that

states can't be forced to hand over such data to the federal

government. State objections to doing so often revolve around

costs; Winkler suggested that more federal grants may be needed

to serve as a financial incentive for states to report the data.

Winkler also said that the system now used to make sure gun

buyers do not have criminal backgrounds should be improved, but

that probably would require an act of Congress. Because of

various loopholes, many lawful gun sales occur without any

background check, Winkler said.

It isn't clear whether such changes could have prevented

many of the shootings that have plagued the nation in recent

years. In the Newtown case, for example, the three guns Lanza

used in the shootings appear to have been purchased legally by

his mother, who was Lanza's first victim, authorities said.

White House officials have not elaborated on what Obama

meant by "meaningful action."

Bloomberg and other gun-control advocates say the president

needs to move quickly and decisively, or risk being cast as part

of the problem.

"We have heard all the rhetoric before," said Bloomberg, who

endorsed Obama's re-election this year. "What we have not seen

is leadership - not from the White House and not from Congress."

A CHANGING POSITION

Early in his political career, Obama expressed support for

increased restrictions on guns.

As a state senator from Illinois representing an urban

Chicago district in 2000, he was quoted in the Hyde Park Herald

as calling for increased penalties for the use of guns, limiting

buyers to one gun purchase a month and tougher laws to stop the

sale of firearms at gun shows.

During his first campaign for president in 2008, Obama said

he backed reinstating the assault weapons ban.

But once in office, he made no big push to do so, a stance

that reflected a lack of enthusiasm on Capitol Hill for such

legislation.

About a month after Obama took office, in February 2009,

Attorney General Eric Holder said that the administration wanted

to reinstate the ban on the sale of assault weapons.

But then House Speaker Nancy Pelosi of California, a fellow

Democrat of Obama, threw cold water on the idea. "I think we

need to enforce the laws we have right now," she said then.

And a spokesman for another Democratic leader, then-Senate

Majority Leader Harry Reid, said the senator would oppose any

effort to revive the assault weapons ban. Reid, a Democrat from

the western state of Nevada, had voted against the ban when it

was instituted back in 1994.

Holder then backtracked. When he was asked about the assault

weapons ban again three weeks later, he said, "I think what

we're going to do is try to enforce the laws that we have on the

books."

Pelosi and Reid have not said whether they would embrace any

new efforts to push for an assault weapons ban or other

gun-control measures.

To date, Obama's administration actually has expanded gun

rights: He signed a law allowing concealed guns to be carried in

national parks such as Yellowstone and the Grand Canyon, and

allowing guns in checked baggage on Amtrak trains.

The Brady Center to Prevent Gun Violence issued a scathing

report in 2010, saying that Obama had "abdicated his

responsibility" on the issue and giving him a grade of "F" for

failing to support gun restrictions he had supported while

campaigning.

A NEW 'POLITICAL CALCULUS'

But the Newtown shooting "may well be a turning point for

the gun debate in America," said Winkler, author of "Gunfight:

The Battle over the Right to Bear Arms in America."

"People seem angrier than ever before," he said. "To see 20

children mercilessly slaughtered in a schoolhouse is too much

for people to bear. I think the political environment is

different today than it was even a few weeks ago. President

Obama, who has avoided gun control assiduously, no longer has to

worry about re-election. President Obama didn't want to talk

about guns, because a lot of swing-state voters feel very

passionately about guns and he needed to win those votes."

Now, Winkler said, "his political calculus has got to be

different."

Winkler also noted that several Republican congressional

candidates who received more than $100,000 from the NRA for the

November elections wound up losing. The NRA has not commented on

the shootings.

"The NRA had a pretty rough November," Winkler said. "So

maybe Democrats are not as fearful of electoral retribution by

the NRA."

(Mason reported from Newtown, Connecticut; Editing by David

Lindsey and David Storey)