equal protection and Nebraska's exemption
In order to get 60 votes for cloture, the Senators pushing the health care bill gave residents of Nebraska special and permanent Medicare benefits. It sounds to me as if it might be violative of equal protection (or the EP component of 5th Amendment due process). A body of people are given an exemption from general law for no rational purpose ... it's just their legislator wanted it as the price of his vote. (On the other hand, it might be argued that appropriations work like this all the time).