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McCain Aide: 'As much as we were prepared, it's tough'

01:52

John Weaver, a political consultant who worked on John McCain's Presidential campaign in 2000 and 2008, reacts to McCain's death, and gave insight into the relationship between McCain and Joe Biden: "They were fast friends. And because of what happened to the Vice President's son and the similar cancer that John succumbed to, that bond grew even tighter between them the last year and with the Senator's family."