President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE on Tuesday cited school shootings when asked about his most difficult day thus far since taking office.

"When you have a school shooting, it’s tremendously — it angers me actually. It really angers me," Trump said in an interview with CSPAN.

"It frustrates everybody. You say 'how could a thing like this happen?' How is it possible when you see innocent children being killed. Teachers," he continued. "That’s something that you just never can really get over."

.@SteveScully: "What was your most difficult day, thus far?"



President Trump: "Well, we've had a lot...When you have a school shooting...That's something that you just never can really get over."



Full interview at 9:55pm ET on C-SPAN https://t.co/nC1kPGJm5T pic.twitter.com/9y1vT2tKCT — CSPAN (@cspan) July 30, 2019

Trump said his reaction following a school shooting is to search for a solution, and noted that there are varying viewpoints on how best to prevent further shootings.

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He pointed to his administration's response in the wake of the February 2018 massacre at Marjory Stoneman Douglas High School in Parkland, Fla. The president held a meeting with survivors and parents of victims of the shooting after a gunman opened fire, killing 17 people. His administration later recommended measures to "harden" schools against future attacks.

"Those are events that really tough to take," he said.

Some analyses show school shootings in the U.S. have been on the rise in recent years. CNN reported last week that there have been 22 school shootings thus far in 2019 in which at least one person who was not the shooter was injured or killed.

Democrats have responded to the incidents with renewed calls for stricter gun laws, while Republicans have favored improvements to background check systems while opposing restricting gun ownership.

Congress passed additional funding to expand the National Instant Background Check System (NICS) in the aftermath of the Parkland shooting.

House Democrats passed two gun control bills earlier this year, but neither has been taken up in the GOP-controlled Senate.