Presidents past and present joined members of Congress from both parties and world leaders in mourning Sen. John McCain and praising him for a lifetime of service and accomplishments. Former Presidents George W Bush and Barack Obama, who blocked the Arizona Republican's own White House ambitions, are among those expected to speak at McCain's funeral.

"These were bitter contests, both of them," said Sen. Jeff Flake, R-Ariz., and "to ask them to speak at your funeral, and for them to be honoured at the opportunity, that tells you all you need to know." Flake told CBS' "Face the Nation" that McCain "was quick to forgive - certainly put the good of the country above himself, and the fact that his former opponents will be there speaking says all we need to know." McCain is expected to be remembered at ceremonies in Arizona and Washington this coming week or next, if the family prefers to give more time for Congress to return to the Capitol from its summer recess.