???? Is there anything to stop Democrats from voting at ALL the precincts in one country?
After a ballot has been cast, there is virtually no way to verify its legality. The only way to stop voter fraud is to catch it before a ballot is cast.
Registration and then verification at the polling place is the most reliable way, which has worked pretty well, up to about the Kennedy era. Liberal Judges have completely nullified voter laws thru out the land.
???? Is there anything to stop Democrats from voting at ALL the precincts in one country?
Of course not.