McCain has held a solid lead over Kirkpatrick in polls of Arizona's Senate race since late August, with TPM's PollTracker Average showing a massive lead for McCain, 53.6 to Kirkpatrick's 44.9.
The incumbent Senator maintained popularity in Arizona's polls in spite of a rocky relationship with his party's presidential nominee.
McCain originally endorsed Donald Trump, but then rescinded his endorsement following the release of a video of Trump bragging about his ability to assault women.
The senator and 2008 Republican presidential nominee also criticized Trump for attacking the family of U.S. Army Captain Humayun Khan, a Muslim-American solider who was killed fighting in Iraq, and recently stated the businessman should "suffer the consequences" for his explicit and demeaning comments.
Trump responded by calling the senator "foul-mouthed," and taking credit for McCain's victory in Arizona's Republican primary.