Live By The Sword, Die By The Sword.

If it's all about the company one keeps, then (via Matt Yglesias):

• Watergate crook Gordon Liddy has contributed money to McCain’s campaigns, hosted a fundraiser for him, and received praise from McCain for his adherence to principle.
  
• McCain sought out, and received, the endorsement of the Rev John Hagee who believes that Katrina was God’s punishment to New Orleans for hosting a gay pride parade.
  
• McCain was a longtime associate of S&L kingpin Charles Keating, a beneficiary of Keating’s largess, and a doer of favors for Keating for which conduct he was officially reprimanded by the United States Senate.
  
• McCain has employed Richard Quinn, publisher of a Confederate nostalgia magazine.
  
• McCain served on the US Council for World Freedom, a far-right group whose parent organization was described by the Anti-Defamation League as “increasingly . . . a gathering place, a forum, a point of contact for extremists, racists and anti-semites.”