Tim McGraw sends 'real hero' John McCain prayers

A post shared by Tim McGraw (@thetimmcgraw) on

Tim McGraw sent his well wishes to Senator John McCain who is battling a brain tumor.

"a real good man and A REAL HERO...... Prayers from the McGraw family," the country singer shared on Instagram along with a photo of McCain during his military days.

McCain revealed Friday he has glioblastoma, an aggressive cancer. Doctors discovered the tumor after the senator underwent a procedure to remove a blood clot from above his left eye.