This was announced, or in writing? Cause later today he said he would work closely with NRA. No way someone cannot buy a firearm for protection until 21. There are 18 year olds with families, and in our military, and the small matter of the voting and drinking age.
None of this would change the outcome of attack. Nor would it have changed the Sandy Hook clearly looney son of a woman who took him to rifle ranges and he took the gun out her cabinet, killed her and then went to the school.
Already getting pushback from lib mayors/heads of school systems who, even when provided with funding for training and support of armed teachers (preferably veterans) being offered-— are saying “no more guns in schools”. Idiotic, and they want no-one to have firearms, except “their” people. Just as in any communist takeover, at the mercy of military and police.
Rumor is the NRA will announce support & plans tomorrow, expecting outrage from our side.