FILE - In this Jan. 13, 2020, file photo Cindy McCain, wife of former Arizona Sen. John McCain, waves to the crowd after being acknowledged by Arizona Republican Gov. Doug Ducey during his State of the State address on the opening day of the legislative session at the Capitol in Phoenix. Democratic presidential candidate former Vice President Joe Biden said Sept. 22 that Cindy McCain plans to endorse him for president. (AP Photo/Ross D. Franklin, File)FILE - In this Oct. 16, 2017, file photo Sen. John McCain, R-Ariz., receives the Liberty Medal from Chair of the National Constitution Center's Board of Trustees, former Vice President Joe Biden, in Philadelphia. Cindy McCain is going to bat for Biden, lending her voice to a video set to air on Tuesday, Aug. 18, 2020 during the Democratic National Convention programming focused on Bidens close friendship with her late husband, Sen. John McCain. (AP Photo/Matt Rourke, File)
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FILE - In this Jan. 13, 2020, file photo Cindy McCain, wife of former Arizona Sen. John McCain, waves to the crowd after being acknowledged by Arizona Republican Gov. Doug Ducey during his State of the State address on the opening day of the legislative session at the Capitol in Phoenix. Democratic presidential candidate former Vice President Joe Biden said Sept. 22 that Cindy McCain plans to endorse him for president. (AP Photo/Ross D. Franklin, File)