They know now that this isn't normal and they shouldn't go to school every day expecting the place to get shot up and they shouldn't be able to joke about which of their classmates will be "the one" to do a school shooting, as they did with Cruz in the months leading up to his actual shooting.
He went on, "It's sad something like that could happen".
Trump is calling the quick response of medical personnel "record-setting" and says some victims reached the hospital in about 20 minutes.
At last check, there were still 7 victims in the hospital recovering from Wednesday's shooting.
Florida governor Rick Scott called for the resignation of Federal Bureau of Investigation director Christopher Wray, claiming that the FBI's failure was "unacceptable". He's very frustrated that people seem to accuse the fact that the only reason he's president is because of some sort of Russian collusion, but I would say the clear message here is Russia did mean to interfere in our election.
Trump then joked that everybody in the room should get a raise.
Senior student David Hogg said Wednesday's mass shooting would be a turning point in American history. "The only way to save our Second Amendment is to vote for a person that you all know named Donald Trump".
Senator Rubio, who arrived with Trump in Air Force One, shared his thoughts. "We are not going to come to him".
The president asked law enforcement officers to introduce themselves and talk about what they did in the rescue efforts.
DWYER: Trump later tweeted that this interference is continuing to achieve its goal.
"You have people who care about you, who love you, and who will do anything at all to protect you", he said.
The First Lady shared a few words for the community as well.
Yarmuth didn't stop his critiques at the President, he said there has been a lack of leadership from Republicans at the national and state level to act on gun control policy. They are our future.
Though Trump ran as an anti-gun control candidate in 2016, before he was a political figure he backed a ban on assault weapons and a longer waiting period for people to buy a weapon. Cruz was previously expelled from the school for unspecified disciplinary reasons, officials said. It's inevitable. I think that's a facade that the GOP is putting up.
"What a great job you've done and we appreciate it very much", the President told the group.
A manager with Florida Gun Shows, Jerry Fernandez, said he believed the shooting was more of a mental health problem and not necessarily a gun problem. "These students, teachers, administrators, and families will all remain in our prayers", he said.
Trump on Friday visited a Florida hospital where numerous victims were treated, as well as the sheriff's office.
It's unclear what Trump is "working with Congress on" that is related to mitigating mass shootings.
President Donald Trump struck a solemn tone Thursday after the deadly school shooting in Florida, describing a "scene of awful violence, hatred and evil" and promising to "tackle the hard issue of mental health", but avoiding any mention of guns.