Arizona Sen. John McCain went hiking with his daughter on Saturday, days after his office announced he had been diagnosed with brain cancer. “Amazing hike with Dad @SenJohnMcCain this morning. Thank you all for your best wishes!” Meghan McCain tweeted on Saturday, sharing a photo of the pair seated together on a bench with a scenic view. The younger McCain also shared a heartfelt tribute to her father on Wednesday following his glioblastoma diagnosis. “He is a warrior at dusk.