Trump insists on arming teachers despite lack of evidence it would stop shootings

The largest teachers’ unions, security guards and military veterans opposed the president’s plan of arming teachers to keep schools safe

In the past 24 hours, Donald Trump has thrice backed a plan to arm teachers in US schools despite the lack of evidence showing this would end school shootings.

Facing opposition from the country’s largest teachers’ unions, school security guards and military veterans, the president continued to endorse the plan in White House meetings and on T...