While in Arizona for treatment, John McCain attends Diamondbacks game with wife, daughter

The GOP senator returned to Phoenix for chemotherapy and radiation treatment.

Sadly, for the McCains, the Diamondbacks lost 8-6.

Regardless, they had a great time. "Having fun at the @Dbacks game with @MeghanMcCain & @cindymccain - let's go #Dbacks!" tweeted Sen. McCain, along with a photo of the trio at the game.

"In accordance with the guidance of his physicians, Senator McCain is returning to Arizona to undergo further treatment at Mayo Clinic," read the statement. "On Monday, July 31, he will begin a standard post-surgical regimen of targeted radiation and chemotherapy. During that time, Senator McCain will maintain a work schedule. He plans to return to Washington at the conclusion of the August recess."