Sometimes I imagine a secret meeting that happened some decades ago between Republicans and Democrats, dividing up the Bill of Rights.
"Well, we have to at least look like we're fighting for them. If we all just agree to protect the Bill of Rights, then we aren't really working for them. How about Democrats get 4, 5, 7, 8, and 9; and Republicans get 1, 2, 3, 6, and 10?"
"Hey, why do we get the Third Amendment?"
"It was our idea."
(This comment is not meant to be taken literally and I'm sure that others will have a different mapping between Amendment numbers and parties.)