President Donald Trump and Melania Trump board Air Force One after meeting people impacted by Hurricane Harvey during a visit to Houston, Saturday, Sept. 2, 2017 (Susan Walsh/AP Photo)
President Donald Trump talks with Sen. Ted Cruz and others before boarding Air Force One at Ellington Field. (Susan Walsh/AP Photo)
President Donald Trump speaks to volunteers at the First Church of Pearland on September 2, 2017, while visiting areas affected by Hurricane Harvey. (NICHOLAS KAMM/AFP/Getty Images)
President Donald Trump, with first lady Melania Trump, greets Sen. Ted Cruz at the First Church of Pearland September 2, 2017 in Pearland, Texas. (Win McNamee/Getty Images)
President Donald Trump and first lady Melania Trump stop to talk with residents impacted by Hurricane Harvey in a Houston neighborhood, Saturday, Sept. 2, 2017. (Susan Walsh/AP Photo)
Trump told drivers outside the First Church in Pearland, "Take care of yourself." Drivers, in turn, thanked Trump and said they are praying for him. (Susan Walsh/AP Photo)
President Donald Trump and first lady Melania Trump hand out emergency supplies to residents impacted by Hurricane Harvey while visiting the First Church of Pearland. (Win McNamee/Getty Images)
US President Donald Trump serves food to Hurricane Harvey victims at NRG Center in Houston on September 2, 2017 (NICHOLAS KAMM/AFP/Getty Images)
President Donald Trump and Melania Trump meet people impacted by Hurricane Harvey during a visit to the NRG Center in Houston, Saturday, Sept. 2, 2017. (Susan Walsh/AP Photo)
President Donald Trump and Melania Trump meet people impacted by Hurricane Harvey during a visit to the NRG Center in Houston, Saturday, Sept. 2, 2017. (Susan Walsh/AP Photo)
President Donald Trump and Melania Trump meet people impacted by Hurricane Harvey during a visit to the NRG Center in Houston, Saturday, Sept. 2, 2017. (Susan Walsh/AP Photo)
President Trump cupped a boy's face in his hands and then gave him a high-five at NRG Center. (Susan Walsh/AP Photo)
President Donald Trump meets people impacted by Hurricane Harvey during a visit to the NRG Center in Houston, Saturday, Sept. 2, 2017. (Susan Walsh/AP Photo)
US President Donald Trump and First Lady Melania Trump serve food to Hurricane Harvey victims at NRG Center in Houston on September 2, 2017. (NICHOLAS KAMM/AFP/Getty Images)
President Donald Trump and First Lady Melania Trump serve food to Hurricane Harvey victims at NRG Center in Houston on September 2, 2017. (NICHOLAS KAMM/AFP/Getty Images)
President Donald Trump visits Hurricane Harvey victims at NRG Center in Houston on September 2, 2017. (NICHOLAS KAMM/AFP/Getty Images)
US President Donald Trump, with Texas Greg Abbott (L) and US First Lady Melania Trump (2nd L) visits Hurricane Harvey victims at NRG Center in Houston on September 2, 2017. (NICHOLAS KAMM/AFP/Getty Images)
President Donald Trump, with Secretary of Housing and Urban Development Ben Carson (2nd R), visits Hurricane Harvey victims at NRG Center in Houston on September 2, 2017. (NICHOLAS KAMM/AFP/Getty Images)
President Donald Trump shakes hands with Texas Gov. Greg Abbott as he and first lady Melania Trump, right, arrive via Air Force One at Ellington Field in Houston. (Susan Walsh/AP Photo)
US President Donald Trump and First Lady Melania Trump arrive in Ellington Field in Houston on September 2, 2017. (NICHOLAS KAMM/AFP/Getty Images)
President Donald Trump waves to the media while boarding Air Force One at Andrews Air Force Base in Md., Saturday, Sept. 2, 2017. (Susan Walsh/AP Photo)
President Donald Trump and first lady Melania Trump walk towards Air Force One at Andrews Air Force Base in Md. (Susan Walsh/AP Photo)