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An Arizona Democratic congressman blasted President Trump on Sunday for a series of tweets he sent regarding the Florida school shooting.

Earlier in the day, Trump tweeted about his disappointment in the FBI for failing to act properly upon tips about suspect Nikolas Cruz.

"This is not acceptable. They are spending too much time trying to prove Russian collusion with the Trump campaign," the president wrote.

Rep. Ruben Gallego of Phoenix said Trump acted in a narcissistic manner following the tragedy in Parkland, Fla.

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 18, 2018

"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," Gallego wrote.

He also said Trump showed "no shame" in tweeting about the new indictments in the Russia probe while children killed in the massacre were being buried by their families and friends.

Children are being buried today. Could you please act presidential at least on their behalf. You really have no shame. https://t.co/lLg9R9Ztcq — Ruben Gallego (@RubenGallego) February 17, 2018

Gallego also said Rep. Carlos Curbelo (R-Fla.) was being "all talk" when the Florida Keys-area lawmaker called for "common-sense gun safety" laws.

He votes for @SpeakerRyan so he knows nothing will move. All talk. https://t.co/xtR6F9jmsC — Ruben Gallego (@RubenGallego) February 18, 2018

"[Curbelo] votes for Speaker Ryan so nothing will move," Gallego said.

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