Being less than 50% of the lawmakers in a society as active followers of your regilion seems quite far from non-existance.
By that metric, Catholics, Jews, Athiests and African-Americans don't exist, and have never existed, and probably will never exist in the USA (they didn't and don't even exist when grouped together as "non-protestants").
Back to Quakers, shortly fter they "tolerated themselves out of exisitence" in Pennsylvania, they manage to have input into the Constitution of the newly formed US so punching above their weight for people who didn't exist.
By that metric, Catholics, Jews, Athiests and African-Americans don't exist, and have never existed, and probably will never exist in the USA (they didn't and don't even exist when grouped together as "non-protestants").
Back to Quakers, shortly fter they "tolerated themselves out of exisitence" in Pennsylvania, they manage to have input into the Constitution of the newly formed US so punching above their weight for people who didn't exist.