PHOENIX, AZ - AUGUST 29: Cindy McCain, wife of Sen. John McCain (R-AZ) touches the casket during his memorial service at the Capitol on August 29, 2018 in Phoenix, Arizona. Sen. McCain, a decorated war hero, died August 25 at the age of 81 after a long battle with Glioblastoma, a form of brain cancer. (Photo by Ross D. Franklin-Pool via Getty Images)

PHOENIX, AZ - AUGUST 29: Police honor guard stand in formation as they await the arrival of the casket carrying U.S. Sen. John McCain (R-AZ) at the Arizona State Capitol on August 29, 2018 in Phoenix, Arizona. Sen. McCain will lie in State at the Arizona State Capitol before being transported to Washington D.C. where he will be buried at the U.S. Naval Academy Cemetery in Annapolis. McCain, a decorated war hero, died August 25 at the age of 81 after a long battle with Glioblastoma, a form of brain cancer. (Photo by Justin Sullivan/Getty Images)

PHOENIX, AZ - AUGUST 29: The Arizona National Guard carries the casket of Sen. John McCain (R-AZ) to his memorial service at the Arizona State Capitol on August 29, 2018 in Phoenix, Arizona. Sen. McCain, a decorated war hero, died August 25 at the age of 81 after a long battle with Glioblastoma, a form of brain cancer. (Photo by Rob Schumacher-Pool/Getty Images)

PHOENIX, AZ - AUGUST 29: The casket of U.S. Sen. John McCain (R-AZ) is carried into the Arizona State Capitol on August 29, 2018 in Phoenix, Arizona. U.S. Sen. John McCain will lie in State at the Arizona State Capitol before being transported to Washington D.C. where he will be buried at the U.S. Naval Academy Cemetery in Annapolis. Sen. McCain, a decorated war hero, died August 25 at the age of 81 after a long battle with Glioblastoma, a form of brain cancer. (Photo by Justin Sullivan/Getty Images)

PHOENIX, AZ - AUGUST 29: A former U.S. Marine Jose Cordero Torres, 82, a Vietnam war veteran, salutes near the casket during a memorial service for Sen. John McCain, R-Ariz. at the Arizona Capitol on August 29, 2018 in Phoenix, Arizona. Sen. McCain, a decorated war hero, died August 25 at the age of 81 after a long battle with Glioblastoma, a form of brain cancer. (Photo by Ross D. Franklin-Pool via Getty Images)

PHOENIX, AZ - AUGUST 29: The Arizona National Guard carries the casket into the museum rotunda during a memorial service for Sen. John McCain (R-AZ) at the Capitol on August 29, 2018 in Phoenix, Arizona. Sen. McCain, a decorated war hero, died August 25 at the age of 81 after a long battle with Glioblastoma, a form of brain cancer. (Photo by Ross D. Franklin-Pool via Getty Images)

PHOENIX, AZ - AUGUST 29: Cindy McCain, wife of Sen. John McCain, R-Ariz. sits with her sons Jack, Jimmy, and daughter Meghan, right, during a memorial service at the Arizona Capitol on August 29, 2018 in Phoenix, Arizona. Sen. McCain, a decorated war hero, died August 25 at the age of 81 after a long battle with Glioblastoma, a form of brain cancer. (Photo by Ross D. Franklin-Pool via Getty Images)

PHOENIX, AZ - AUGUST 29: A former serviceman salutes near the casket during a memorial service at the Arizona Capitol on August 29, 2018, in Phoenix, Arizona. Sen. McCain, a decorated war hero, died August 25 at the age of 81 after a long battle with Glioblastoma, a form of brain cancer. (Photo by Jae C. Hong - Pool/Getty Images)

PHOENIX, AZ - AUGUST 29: The Arizona National Guard carries the casket into the museum rotunda during a memorial service for Sen. John McCain (R-AZ) at the Capitol on August 29, 2018 in Phoenix, Arizona. Sen. McCain, a decorated war hero, died August 25 at the age of 81 after a long battle with Glioblastoma, a form of brain cancer. (Photo by Jae C. Hong-Pool via Getty Images)

PHOENIX, AZ - AUGUST 29: U.S. Naval sea cadets walk past the casket during a memorial service at the Arizona Capitol on August 29, 2018, in Phoenix, Arizona. Sen. McCain, a decorated war hero, died August 25 at the age of 81 after a long battle with Glioblastoma, a form of brain cancer. (Photo by Jae C. Hong - Pool/Getty Images)