Bingo. This is very slightly disguised criticism of the President. GW appointed him and stood by him for many years. If he wasn't doing his job it was the responsibility of the President to replace him.
Apparently, McC doesn't have the cojones to criticize GW directly.
I don't think it is a "diguised" attack on the POTUS at all.
McCain has attacked Pres. Bush at every opportunity...I think this was an open attack on Bush.
McCain is a LOSER.
No. Rather it's that McCain doesn't think that we're smart enough to make the connection between Rumsfeld and the President.
Regards,
TS