Just last year, the Parents Opposed to Pot lobby group tried to sound the alarm on the link between marijuana and mass shootings, compiling a list of mass killers it claims were heavy users of marijuana from a young age, from Aurora, Colo., shooter James Holmes and Tucson, Ariz., shooter Jared Loughner to Chattanooga, Tenn., shooter Mohammad Abdulazeez.

Until we understand those links, it is nuts to enact lax laws that ­encourage more young people to use a drug proven to trigger mental illness.

President Trump was right to highlight mental illness in his remarks Wednesday on the El Paso and Dayton shootings, not that his unscrupulous critics will listen, so determined are they to brand him a white supremacist.

We know from a 2018 FBI report that 40% of “active shooters” in the US between 2008 and 2013 had been diagnosed with a mental illness before the attack and 70% had “mental health stressors” or “mental health concerning behaviors.”