The senate and the upper class exercised that. A direct democracy is when people vote directly for each and every vote and law, in a representative democracy the people vote for other people to do that.
Direct democracy is a form of democracy in which people decide on policy initiatives directly. This differs from the majority of currently established democracies, which are representative democracies.
An example of this would be where each person in a nation votes DIRECTLY fore their president or prime minister.
This policy declared that the U.S. was allowed foreign interference in Latin American countries in order to protect their democracy nd prevent other nations such as ones from Europe from going in and taking over or exploiting them.