Bob Dole resigned, although he didn't have to.
McCain did not resign because he didn't have to and he is a scumbag.
McCain’s service was admirable, and for it he deserves our gratitude, but during his time in the senate, he has been little more than a media whoring low-life, trying to push his agenda on others.(BIG government and the Military Industrial Complex) I don’t think he has seen a spy program against law abiding citizens that he didn’t like. The 4th Amendment doesn’t exist to him.(among others)
His little bitch Lindsey Grahamnesty is being groomed to take his place, when he finally falls over.