I think it is population.
The anti-federalists pushed for a strong state government and a comparatively weak central government. They were all for the idea of state's rights, which is why they opposed the ratification of the constitution.
<span>A large and densely populated urban area</span>
The referendum is the progressive
reform that allowed the voters to approve or reject laws passed by the
legislature.
To add, a referendum (plural referendums, see below) is a
direct vote in which an entire electorate is asked to vote on a particular
proposal.
