McCain’s 106-year-old mother expected to attend memorial, burial services in Washington
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Sen. John McCainJohn Sidney McCainMeghan McCain to produce 'Don't Sweat the Small Stuff' Lifetime movie starring Heather Locklear An August ultimatum: No recess until redistricting reform is done Meghan McCain on Pelosi, McCarthy fight: 'I think they're all bad' MORE's 106-year-old mother is expected to attend his memorial and burial services in Washington and Maryland this week, according to the Associated Press

The senator credited his mother, Roberta McCain, in one of his books with "the strengths she taught [him] by example."

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"… [M]y mother was raised to be a strong, determined woman who thoroughly enjoyed life, and always tried to make the most of her opportunities," John McCain wrote. "She was encouraged to accept, graciously and with good humor, the responsibilities and sacrifices her choices have required of her. I am grateful to her for the strengths she taught me by example."

Roberta McCain married John McCain’s father at age 21 and moved around to accommodate her husband’s posting with the Navy. He would later go on to become a Navy admiral. She also traveled abroad often with her identical twin sister and accompanied her son on the campaign trail during his 2008 presidential bid, despite being well into her 90s.

John McCain died Saturday at age 81 after a more than year-long battle with an aggressive form of brain cancer.