President Donald J. Trump and First Lady Melania Trump visit with patient Brady Cook of Las Vegas, and members of his family, Wednesday, October 4, 2017, at the University Medical Center of Southern Nevada, who was injured in the mass shooting, Sunday, October 1, 2017, in Las Vegas, Nevada. (Official White House Photo by Shealah Craighead)

President Donald J. Trump and First Lady Melania Trump visit with patient Natalie Vanderstay of Santa Clara, Calif., Wednesday, October 4, 2017, at the University Medical Center of Southern Nevada, who was injured in the mass shooting, Sunday, October 1, 2017, in Las Vegas, Nevada. (Official White House Photo by Shealah Craighead)

President Donald J. Trump and First Lady Melania Trump visit with patient Michael McDaniel of Las Vegas, and members of his family, Wednesday, October 4, 2017, at the University Medical Center of Southern Nevada, who was injured in the mass shooting, Sunday, October 1, 2017, in Las Vegas, Nevada. (Official White House Photo by Shealah Craighead)

President Donald J. Trump and First Lady Melania Trump visit with patient Thomas Gunderson of Newport Beach, Calif., and members of his family, Wednesday, October 4, 2017, at the University Medical Center of Southern Nevada, who was injured in the mass shooting, Sunday, October 1, 2017, in Las Vegas, Nevada. (Official White House Photo by Shealah Craighead)

President Donald J. Trump and First Lady Melania Trump visit with patient Jenna Rushton of Southlake, Texas, and members of her family, Wednesday, October 4, 2017, at the University Medical Center of Southern Nevada, who was injured in the mass shooting, Sunday, October 1, 2017, in Las Vegas, Nevada. (Official White House Photo by Shealah Craighead)

President Donald J. Trump and First Lady Melania Trump visit with patient Tiffany Huizar of Santa Anna, Calif., Wednesday, October 4, 2017, at the University Medical Center of Southern Nevada, who was injured in the mass shooting, Sunday, October 1, 2017, in Las Vegas, Nevada. (Official White House Photo by Shealah Craighead)

President Donald J. Trump and First Lady Melania Trump visit with patient Clint Burton of Gillette, Wyoming, and members of his family, Wednesday, October 4, 2017, at the University Medical Center of Southern Nevada, who was injured in the mass shooting, Sunday, October 1, 2017, in Las Vegas, Nevada. Gillette was aided by his son, Bayelee, right, at the scene, who had taken a CPR class the day before the shooting. (Official White House Photo by Shealah Craighead)

President Donald J. Trump and First Lady Melania Trump visit with patient Danae Gibbs of Cedar Park, Texas, and members of her family, Wednesday, October 4, 2017, at the University Medical Center of Southern Nevada, who was injured in the mass shooting, Sunday, October 1, 2017, in Las Vegas, Nevada. (Official White House Photo by Shealah Craighead)