"Ninety-eight percent of all mass shootings in the United States since 1950 have taken place in gun-free zones; where guns were not inside the school, or, as an example, you take Pulse Nightclub", Trump said.
Jury selection got underway Thursday in the trial of the Pulse gunman's widow.
Nearly two years after a gunman fatally shot 49 people and injured dozens more in an attack on Pulse Orlando nightclub, his widow was in court, charged with helping her husband plan the attack.
Noor Salman, 31, is charged with aiding and abetting and obstruction of justice. Salman's attorney will likely argue she did not know anything about what her husband was planning and try to prove she suffered from PTSD from abuse from her husband.
Salman was hours away at the couple's home in Ft.
Byron asked the potential jurors if they or anyone they know has been affected by terrorism and if they would be able to set aside any personal feelings about 9/11 or other terror attacks should they be selected to serve on the jury.
As of Thursday, there are five jurors in the pool.
IS did claim responsibility shortly after the shooting on its al-Bayan Radio station, saying: "One of the Caliphate's soldiers in America carried out a security invasion where he was able to enter a crusader gathering at a nightclub for homosexuals in Orlando".
The trial is expected to last about 25 days.
Once the federal trial starts, the courtroom will be open to the public but no cameras will be allowed.
Salman faces life in prison, but not the death penalty.
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