President Trump reiterated support for arming teachers in U.S. schools on Saturday, saying school shootings "will not happen again."

Why it matters: Trump's making clear that the controversial policy, which he first proposed during the White House listening session earlier this week, was not just a fleeting suggestion. He said on Thursday that armed teachers could "immediately fire back if a savage sicko came to a school with bad intentions." A new CBS News poll found that Americans are split on the idea.