Rep. Ruben Gallego Ruben GallegoHispanic caucus report takes stock of accomplishments with eye toward 2021 Senators call on Pentagon to reinstate funding for Stars and Stripes newspaper Hispanic Caucus campaign chief to mount leadership bid MORE (D-Ariz.) tore into President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE after the president suggested the FBI could have stopped a deadly shooting at a Florida high school if it spent less time working on the Russia investigation.

"You are such a psychopath that you have to make even the death of 17 children about you," he tweeted.

"America will regret the day you were ever born."

You are such a psychopath that you have to make even the death of 17 children about you. America will regret the day you were ever born. https://t.co/5jyhVXRSRn — Ruben Gallego (@RubenGallego) February 17, 2018

ADVERTISEMENT

Trump late Saturday tweeted about the shooting, saying it was not acceptable that the FBI missed "many signals" sent out by the alleged gunman.

"Very sad that the FBI missed all of the many signals sent out by the Florida school shooter. This is not acceptable. They are spending too much time trying to prove Russian collusion with the Trump campaign - there is no collusion. Get back to the basics and make us all proud!" he tweeted.

The FBI said Friday it failed to follow "protocols" when it received a tip earlier this year about 19-year-old Nikolas Cruz, who officials say killed 17 people and injured 14 others last week in Parkland, Fla.

A person close to Cruz called the FBI's public tipline and raised concerns about him in January, the bureau said.

But the FBI never reported the tip to its Miami field office of investigated the claim, it added.

Multiple lawmakers have called for Congress to act to prevent another tragedy following the shooting.