Though Senator Marco Rubio didn't use these words in the aftermath of the shooting that left at least 17 dead, he was criticized for saying that "today is that awful day you pray never comes".
Fifteen wounded survivors were hospitalised as bodies were recovered from inside and around Marjory Stoneman Douglas High School in Florida.
Kardashian and Witherspoon, who boast 58.8 million and 2.2 million Twitter followers, respectively, urged fans and lawmakers to "do more".
Following the shooting, Trump tweeted that his "prayers and condolences" were with the families affected by the shooting, adding that "no child, teacher or anyone else should ever feel unsafe in an American school".
His proclamation on the tragedy doesn't mention it was a mass shooting. This is the 18th in 45 days of 2018. A teacher also confirmed that Nikolas had been flagged for "threatening students" previous year and was not allowed on campus with a backpack. We must do more to prevent these senseless acts of gun violence.
Parkland, with a population of 31,000 people in 2016, was named Florida's safest city a year ago, according to an analysis by the Washington-based National Council for Home Safety and Security, a home security industry trade association.
Another student who was in class at the time of the shooting said she "cannot unsee" the terror that unfolded before her. He later said a family friend's child was shot during the incident.
Cruz was captured in a quiet neighborhood about two miles from the school. How many kids need to die!
Broward County school district Superintendent Robert Runcie told WSVN on Thursday morning that seeing the bodies strewn on floors inside Marjory Stoneman Douglas High School "was absolutely horrific".
Fifteen victims were also hospitalized. Please keep in mind the horror of what we've gone through today. This does not have to be our collective reality.
She wrote: "Just heard the tragic news about Florida".