If Aaron Feis, the assistant football coach slain last week at Marjory Stoneman Douglas High School, had been carrying a gun, the rest of the massacre there would have been averted, Trump claimed Wednesday at a White House "listening session" with Douglas survivors and other victims of gun violence.
"We're going to be very strong on background checks. very strong emphasis on the mental health", Trump told students and family members affected by last week's high school massacre in Florida and other mass shootings in the past.
"We need that", the president said.
The meeting included six students from Marjory Stoneman Douglas High School in Parkland, Fla., where 17 students and educators were killed on February 14.
President Trump holds notes during a listening session with high school students at the White House Wednesday.
"Highly trained, gun adept, teachers/coaches would solve the problem instantly, before police arrive", the President tweeted, arguing it would stop any "savage sicko" who was intent on attacking students. "And like Mr. President said, if you could find 20% of maybe retired law enforcement officers, or a teacher who could go through discreet training to carry a firearm around his waist, it could've been a very different situation", Hunter Pollack said. "What I said was to look at the possibility of giving concealed guns to gun adept teachers with military or special training experience - only the best".
More than 100 survivors from the Marjory Stoneman attack took part, including school senior Delaney Tarr who warned lawmakers that they were coming after them.
Before Trump's meeting, students across the United States walked out of classes in sympathy protests, including hundreds of teens from the Washington suburbs who gathered in front of the White House. "Because my daughter, I'm not going to see again", Mr Pollack said.
Donald Trump also promised stronger background checks on gun buyers.
He said that as things stand, attackers have nothing to lose because no one can shoot back.
Zeif, 18, said he fully respected the Second Amendment that protects gun ownership in the country but questioned why Cruz was permitted to buy an assault rifle, which he called a "weapon of war". "I just grieve for you, I feel so - to me, there could be nothing worse than what you've gone through". He also pledged action on gun control.
No, these Florida school shooting survivors are not paid actors. After Sandy Hook? I'm sitting with a mother who lost her son.
While many attending the President's programme supported his proposal, others have strongly condemned it. I can't feel comfortable in my country knowing that people have, will have, or ever [are] going to feel like this.
"Thank you for pouring out your hearts because the world is watching and we're going to come up with a solution", he said after the meeting.Marco Rubio (R-FL) said he would not support arming teachers. But while gun control discussions are second-nature to most Americans, few understand how bump stocks work, why they're so risky, and what Trump's ban on them would mean.