"No person in the U.S. is required to present identification on demand. The fourth amendment does not say anything about citizenship. Suffrage is a whole separate issue, and the leftists tend to lump them together. Once the right to be secure in your person, papers, and effects is waived; suffrage becomes moot. Retroactive laws that disenfranchise a larger group are desired by both parties."
You are correct. Howwever, that is the source of the problem. On one hand, we have the freedom not to "show our papers" on demand. On the other, that means that anyone in this country must be assumed to be here legally.
There's a definite conflict here, and that's at the heart of our immigration problems right now. If you cannot demand that someone prove his or her citizenship, then everyone becomes a citizen by default.
So, what to do? Either we have some sort of uniform national I.D. or we have no control whatever of those who may have entered the country illegally.
Which situation do you prefer?