Following the Valentine's Day school shooting at Stoneman Douglas High School in Parkland, Florida which left 17 dead, Donald Trump has been taking all kinds of flak for blaming the massacre on not a lack of sensible gun control, but instead a deficiency in how the country deals with mental health.

Plenty of people of people took the president to task, pointing out how one of his first actions in office was to reverse an Obama-era regulation that made it harder for people known to be suffering from mental illness to buy firearms.

"Nearly a year ago, on Feb. 28, 2017, President Trump signed H.J. Res. 40, effectively ending the Social Security Administration's requirement to enter the names of people who receive mental health benefits into the National Instant Criminal Background Check System. This is the database used by the FBI to determine who is able to purchase firearms," wrote ABC News' Alisa Wiersema on Thursday.

A day after the massacre, Trump blamed those who knew the gunman for not reporting his disturbing behavior.

"So many signs that the Florida shooter was mentally disturbed, even expelled from school for bad and erratic behavior," he tweeted. "Neighbors and classmates knew he was a big problem. Must always report such instances to authorities, again and again!"

Source: abcnews.go.com