She mentioned several proposals they could support, such as "hardening our schools", putting officers in schools and training volunteer teachers to use guns.
Trump's call has met with some criticism, including from Florida Gov. Rick Scott, who said Friday his focus is on bringing in law enforcement who are well trained with firearms.
The idea has bipartisan support and is also embraced by gun-rights groups, as it does not impose new firearms regulations.
In Florida, meanwhile, funerals continued.
Trump acknowledged there would be opposition to the concealed carry idea, though said it "could very well solve your problem", citing less violence on airplanes since pilots have begun carrying guns. Schools must be the most hardened targets in this country.
- Donald J. Trump (@realDonaldTrump) February 22, 2018 " So for doing that, I want to give Mr. Trump and Dana a detention.
Departing the White House for the Conservative Political Action Conference, Trump told reporters that "when it came time to get in there and do something", Florida deputy Scot Peterson "didn't have the courage or something happened".
But Trump's shifting positions on gun proposals make it hard for congressional Republicans to know whether they would get any political cover with a base that continues to stand by core beliefs to protect the Second Amendment. "The whole idea from some of our opponents that armed security makes us less safe is completely ridiculous". Instead, he complained that liberals are trying to exploit the Florida shooting to advance their agenda.
"A security guard doesn't know the children, doesn't love the children", he said.
"I am devastated", Israel added.
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"I've spoken to them often in the last two days", Trump acknowledged, "and they want to do the right thing". As a long-time educator (teacher and administrator), I've seen first hand how unpredictable school environments can be.
"I think that's a very negative thing to be talking about".
In Congress, a bill being drafted by Sens.
A number of Republicans are interested in the other proposals - background checks, mental-health screening, and banning bump stocks. And he remains opposed to a full ban on assault rifles, Shah said.
"This does not pass any common sense test whatsoever", said Lily Eskelsen Garcia, president of the National Education Association.
Black, the Freedom student, said her peers need to know that they can make a difference and get elected officials to hear their voices. The students and their parents appealed to him to press for stricter gun controls.
Others have pointed out that stigmatizing people with mental health issues is not the best way to address the crisis. Most state and local officials at the meeting did not object. Still, gun owners are a key part of his base of supporters.
The walkout is scheduled to take place at 10 a.m., and will last 17 minutes to honor each of the victims at Parkland. Countries and states that legally limit overall gun ownership simply have fewer gun deaths.
Still, Rep. Tom Rooney, R-Fla, said the president has a "unique ability right now to maybe really do something about these school shootings" because, at least in some districts, "nobody is more popular", including the NRA.