Former presidents George W. Bush and Barack Obama Barack Hussein ObamaObama warns of a 'decade of unfair, partisan gerrymandering' in call to look at down-ballot races Quinnipiac polls show Trump leading Biden in Texas, deadlocked race in Ohio Poll: Trump opens up 6-point lead over Biden in Iowa MORE were reportedly surprised when late Sen. John McCain John Sidney McCainAnalysis: Biden victory, Democratic sweep would bring biggest boost to economy The Memo: Trump's strengths complicate election picture Mark Kelly: Arizona Senate race winner should be sworn in 'promptly' MORE (R-Ariz.) asked them to deliver eulogies at his funeral earlier this year, CNN reports.

Bush and Obama both faced the late senator in brutal presidential races in the 2000 primary and 2008 general, respectively.

Their roles in McCain's upcoming funeral are considered a call for civility and bipartisanship in politics.

McCain called each former president this past spring and asked them to participate, according to CNN.

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One person who will not be in attendance at the funeral is President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE, with whom McCain had a strained relationship.

McCain was a frequent critic of White House policies, particularly on foreign relations.

Trump personally attacked the late senator during his campaign, saying he was not a war hero since he had been captured in Vietnam.