WASHINGTON: The nation should keep assault rifles out of the hands of anyone under 21, President Donald Trump declared Thursday, defying his loyal supporters in the National Rifle Association amid America’s public reckoning over gun violence.

He also pushed hard for arming security guards and many teachers in US schools.“There’s nothing more important than protecting our children,” Trump said, adding that he’d spoken with many members of Congress and NRA officials and insisting they would go along with his plans in the wake of last week’s school shooting in Parkland, Florida, that left 17 people dead.

But there were no words of support from the NRA for his minimum-age proposal — and outright opposition from organizations of teachers and school security guards for the idea of arming schools to deal with intruders.

“The NRA will back it and so will Congress,” Trump contended as he called for raising the legal age of purchase for “all” guns from 18 to 21. A spokesman later said Trump was speaking specifically about semi-automatic weapons. The president’s proposal came just hours after the NRA affirmed its opposition, calling such a restriction an infringement on gun owners’ rights.

Trump has spent the past two days listening to ideas about how to stem gun violence at schools after last week’s shooting at Marjory Stoneman Douglas High School. On Wednesday, he heard from students and family members of those killed in recent shootings and on Thursday from local and state officials.

In Florida, meanwhile, funerals continued. And a sheriff’s deputy who had been on duty at the school but never went inside to confront the shooter resigned after being suspended without pay.

Trump has been proposing a growing list of ideas, including more stringent background checks for gun buyers, reopening some mental institutions to hold potential killers and banning “bump stock” devices that allow semi-automatic rifles to mimic machine guns.

He said Thursday that many teachers have military experience and suggested they be paid bonuses for the added responsibility of carrying weapons. He also appeared open to other proposals to “harden” schools, such as fortifying walls and limiting entry points.

One idea he didn’t like: the “active shooter” drills that some schools hold. He called that “a very negative thing” and said he wouldn’t want his own son participating.

Spokesman Raj Shah later said Trump was concerned about the name and would prefer calling them safety drills.

In Florida, Republican Sen. Marco Rubio said he now is open to raising age requirements for long-gun purchases. That was the day after he was confronted at a CNN town hall by Parkland students and parents over his pro-gun votes and support from the NRA.

Kansas Sen. Pat Roberts, another Republican, told reporters during a visit to the Kansas Statehouse that he supported raising age requirements, saying: “Certainly, nobody under 21 should have an AR-15.”

NRA leaders emerged in unannounced appearances at the annual Conservative Political Action Conference, blaming the FBI and local reporting failures for the Florida shooting.

“Evil walks among us and God help us if we don’t harden our schools and protect our kids,” said Executive Vice President and CEO Wayne LaPierre. “The whole idea from some of our opponents that armed security makes us less safe is completely ridiculous.”

NRA officials also accused Democrats and media outlets of exploiting the Florida shooting.

“Many in legacy media love mass shootings,” spokeswoman Dana Loesch said at CPAC. “Now I’m not saying that you love the tragedy, but I am saying that you love the ratings. Crying white mothers are ratings gold.”

She and LaPierre did not mention the age requirement issue in their fiery remarks at CPAC. But Loesch said Wednesday night the NRA opposes the higher minimum age for rifles because, “if we are asking young men and women to go and serve their country (in the military) they should be able to also have a firearm.”

She added, “I’m also thinking of young women” who may need a rifle for self-protection.

The NRA was an early supporter of Trump’s campaign, and it remains unclear how far the president will go to cross them.

Shortly before LaPierre took the stage, Trump offered a rallying cry on Twitter, calling NRA leaders “Great People and Great American Patriots. They love our Country and will do the right thing.”

“I don’t think I’ll be going up against them,” he said of the politically influential group. “I really think the NRA wants to do what’s right.”

In Congress, a bill being drafted by Sens. Dianne Feinstein, D-Calif., and Jeff Flake, R-Ariz., would apply more broadly than just to assault rifles such as the AR-15 used in the Florida shootings. It would raise the age requirements for all rifles.

In the end, Trump did not stray too far from conservative Republican orthodoxy. His focus when it comes to background checks is on mental health concerns and not loopholes that permit loose private gun sales on the internet and at gun shows. And he remains opposed to a full ban on assault rifles, Shah said.

Democratic Leader Chuck Schumer said he was skeptical the president would follow though.

“The last time he showed support for sensible gun reform — no fly, no buy — he quickly dropped his support once the NRA opposed it. I hope this time will be different,” Schumer said in a statement, referring to a measure backed by Democrats to prevent people on a terrorism-related “no fly” list from buying guns.

Indeed, it is not clear that the GOP-controlled Congress, which is in recess, will take up or act on a variety of legislative proposals that have been made to address gun violence. Those include measures to expand federal background checks, allow authorities to issue emergency orders to take guns from people identified as a threat to themselves or others, and raise the minimum age for rifle purchases to 21.

The current federal minimum for buying handguns from registered dealers is 21, but the requirement in most places is 18 for rifles, including assault-type weapons such as the AR-15. In some states — mostly rural states with a strong tradition of hunting — young people can buy a rifle at age 14 or 16.

Polls show growing support for gun control measures, including 97-percent backing for universal background checks in a Quinnipiac University survey released Tuesday.

But recent mass shootings, including the 2012 mass murder of elementary school children in Newtown, Connecticut, and the killing of 58 people in Las Vegas last fall, have not resulted in significant legislation. In fact, a bill passed by the House in December would make it easier for gun owners to carry concealed weapons across state lines.

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.