I have a hard time believing this is genuine. It's more insulting than Senators usually act.
Probably because the quality and character of "Senators" today, is a far cry from those that served our country from its inception....
Kennedy, Clinton, Leahy, Durbin, Schumer, Biden, Boxer, Kerry, Reid, Levin, Murry, Rockefeller, Wyden, Lautenberg, etc, etc......
Get the message?
Another possibility, this may be McCain's first swipe at one he assumes is a likely opponent in his march to the White House...
Semper Fi