McCain's comments came while he was speaking about his relationship with President Barack Obama, The Hill reported.
"The president and I, he's in his last term, I'm probably in mine, the relationship we have had over the past three years is quite good," McCain told The Wrap in an interview. "Quite good."
McCain, a 77-year-old Republican representing Arizona, has served 27 years in the Senate.
However, McCain said he wasn't quite sure whether this will be his last term or not.
"Nah, I don't know," McCain said. "I was trying to make a point. I have to decide in about two years so I don't have to make a decision. I don't want to be one of these old guys that should've shoved off."
Meanwhile, the Russian Communist Party newspaper Pravda has tentatively agreed to publish an op-ed written by McCain, RIA Novosti reported.
The agreement came after McCain slammed Russian President Vladimir Putin's op-ed in The New York Times that was highly critical of the United State's push to intervene in Syria.
McCain called Putin's piece "an insult to the intelligence of every American," and said "I would love to have a commentary in Pravda." referring to Russia's strict press policies.
"If John McCain wants to write something for us, he is welcome," Dmitry Sudakov, the English editor of Pravda, said. "We have been critical of his stance on Russia and international politics in our materials, but we would be only pleased to publish a story penned by such a prominent politician as John McCain."