Washington (CNN) Former Vice President Joe Biden recently took a trip to Arizona to visit Sen. John McCain, who is battling brain cancer, and says McCain is "concerned about the state of the country," The New York Times reported Saturday.

Biden described the visit, which took place last Sunday, to the Times, saying, "John knows he's in a very, very, very precarious situation, and yet he's still concerned about the state of the country." Biden told the newspaper that he and McCain "talked about how our international reputation is being damaged and we talked about the need for people to stand up and speak out."

McCain was diagnosed with brain cancer last year and is at home in Arizona recovering from side effects associated with his treatment.

Former Presidents George W. Bush and Barack Obama have been asked to deliver eulogies at McCain's funeral, people close to both former presidents and a source close to the senator confirmed to CNN. McCain unsuccessfully challenged Bush for the GOP presidential nomination in 2000 and Obama in the 2008 general election.

President Donald Trump is not expected to be invited to the funeral service, a source close to McCain confirmed.

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