The northeast has the smallest states.
Rhode Island, Delaware, Conneticut, New Jersey, Maryland, New Hampshire, Vermont, and Massachusetts.
Individual citizens elect legislators, who create public policy. Media organizations influence individual citizens and interest groups influence legislators, so they indirectly have a very great influence on public policy. Political parties dominate the legislative branch, and legislators generally follow the platform of their parties.
Note: Foreign diplomats do not have as great or official an influence as those listed above, but they do play a role in pursuing policies that benefit their own country.