Lindsey Graham and John McCain were best friends.  Graham is Megan Mccain’s godfather.   Senator Graham has been largely silent as his best friend is being maligned by President Trump.

What about your friends, will they stand their ground,
Will they let you down again?
What about your friends, are they gonna be lowdown, 
Will they ever be around,
Or will they turn their backs on you?   

“What about your friends” written by Dallas Austin and Lisa “Left Eye” Lopez (1992)