Cindy McCain, wife of, Sen. John McCain, R-Ariz. lays her head on casket during a memorial service at the Arizona Capitol on Wednesday, Aug. 29, 2018, in Phoenix. The body of John McCain, who endured 5 1/2 years as a prisoner of war in Vietnam and went on to become a lion of the U.S. Senate and a two-time Republican candidate for president, will lie in state on Wednesday in the Arizona state capitol. AP Photo/Ross D. Franklin, Pool

Cindy McCain, wife of Sen. John McCain, R-Ariz. arrives with her sons Jack, right, and Jimmy for a memorial service at the Arizona Capitol on Wednesday, Aug. 29, 2018, in Phoenix. The daylong public viewing of his casket was due to kick off five days of memorial tributes in Phoenix and Washington for McCain, who died on Saturday at his ranch in Cornville, Arizona, from brain cancer. He was 81. AP Photo/Ross D. Franklin, Pool

Cindy McCain, wife of Sen. John McCain, R-Ariz. sits with her son Jack during a memorial service at the Arizona Capitol on Wednesday, Aug. 29, 2018, in Phoenix. Wednesday's observance was to open with a private ceremony inside the Rotunda of the Arizona statehouse, after which members of the public were invited to pay their respects from 2 p.m. until 8 p.m. local time. AP Photo/Jae C. Hong, Pool

Cindy McCain, wife of, Sen. John McCain, R-Ariz. touches the casket during a memorial service at the Arizona Capitol on Wednesday, Aug. 29, 2018, in Phoenix. McCain is only the third individual so honored in Arizona's state capitol over the past 40 years, organizers of the ceremony said. The two others were state Senator Marilyn Jarrett in 2006 and Olympic gold medalist Jesse Owens, a Tucson resident, in 1980. AP Photo/Jae C. Hong, Pool

U.S. Naval sea cadets walk past the casket to pay their respects to Sen. John McCain, R-Ariz. at the Arizona Capitol on Wednesday, Aug. 29, 2018, in Phoenix. A memorial service, to be attended by family, friends, political leaders and other dignitaries, is scheduled for Thursday at the North Phoenix Baptist Church. McCain's body will be flown afterward to Andrews Air Force Base outside Washington. AP Photo/Jae C. Hong, Pool

Veterans walk past the casket of Sen. John McCain, R-Ariz. at the Arizona Capitol on Wednesday, Aug. 29, 2018, in Phoenix. His body will then lie in state on Friday at the U.S. capitol for another memorial ceremony and public viewing, to be followed on Saturday by a funeral service at the Washington National Cathedral. AP Photo/Ross D. Franklin, Pool